CVE-2026-53785

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.(CVE-2026-43619)

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.(CVE-2026-53783)

rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir() to the module root at session initialization without resolving symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files relative to the symlink target rather than the intended module root, enabling unauthorized file access.(CVE-2026-53784)

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.(CVE-2026-53785)

rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers can inject client-side merge file directives during filter evaluation to introduce rules that supersede daemon module-level restrictions, gaining access to files the module filter was intended to exclude.(CVE-2026-53786)

rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.(CVE-2026-53788)

rsync before 3.5.0 contains an improper path handling vulnerability that allows a malicious sender to expand the scope of --delete operations beyond the intended destination subtree by sending a crafted file list that causes rsync to reclassify implied parent directory entries or treat synthetic paths as the transfer root. Attackers can exploit multiple variants including implied parent reclassification, synthetic root path construction, legacy protocol behavior below version 30, and…

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.(CVE-2026-43619)

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.(CVE-2026-53783)

rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir() to the module root at session initialization without resolving symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files relative to the symlink target rather than the intended module root, enabling unauthorized file access.(CVE-2026-53784)

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.(CVE-2026-53785)

rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers can inject client-side merge file directives during filter evaluation to introduce rules that supersede daemon module-level restrictions, gaining access to files the module filter was intended to exclude.(CVE-2026-53786)

rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.(CVE-2026-53788)

rsync before 3.5.0 contains an improper path handling vulnerability that allows a malicious sender to expand the scope of --delete operations beyond the intended destination subtree by sending a crafted file list that causes rsync to reclassify implied parent directory entries or treat synthetic paths as the transfer root. Attackers can exploit multiple variants including implied parent reclassification, synthetic root path construction, legacy protocol behavior below version 30, and…

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.(CVE-2026-43619)

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.(CVE-2026-53783)

rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir() to the module root at session initialization without resolving symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files relative to the symlink target rather than the intended module root, enabling unauthorized file access.(CVE-2026-53784)

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.(CVE-2026-53785)

rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers can inject client-side merge file directives during filter evaluation to introduce rules that supersede daemon module-level restrictions, gaining access to files the module filter was intended to exclude.(CVE-2026-53786)

rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.(CVE-2026-53788)

rsync before 3.5.0 contains an improper path handling vulnerability that allows a malicious sender to expand the scope of --delete operations beyond the intended destination subtree by sending a crafted file list that causes rsync to reclassify implied parent directory entries or treat synthetic paths as the transfer root. Attackers can exploit multiple variants including implied parent reclassification, synthetic root path construction, legacy protocol behavior below version 30, and…

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)

• rsync: rsync: TLS Certificate Validation Bypass allows interception of encrypted sessions (CVE-2026-70454)

• rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)

• rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)

• rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)

• rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)

• rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)

• rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)

• rsync: rsync: Authorization bypass via auth users directive parsing (CVE-2026-70463)

• rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)

• rsync: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (CVE-2026-53791)

• rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)

• rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)

• rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)

• rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)

• rsync: rsync: Memory corruption via out-of-bounds write in size parsing (CVE-2026-70457)

• rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)

• rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)

• rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)

• rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)

Bug Fix(es) and Enhancement(s):

• Rebase rsync to version 3.2.7 in Rocky Linux9 (JIRA:Rocky Linux-248835)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)

• rsync: rsync: TLS Certificate Validation Bypass allows interception of encrypted sessions (CVE-2026-70454)

• rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)

• rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)

• rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)

• rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)

• rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)

• rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)

• rsync: rsync: Authorization bypass via auth users directive parsing (CVE-2026-70463)

• rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)

• rsync: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (CVE-2026-53791)

• rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)

• rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)

• rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)

• rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)

• rsync: rsync: Denial of Service via Zstandard compression thread exhaustion (CVE-2026-70455)

• rsync: rsync: Memory corruption via out-of-bounds write in size parsing (CVE-2026-70457)

• rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)

• rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)

• rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)

• rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)

Bug Fix(es) and Enhancement(s):

• Rebase rsync to version 3.5.0 in Rocky Linux10 (JIRA:Rocky Linux-246094)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)

• rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)

• rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)

• rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)

• rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)

• rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)

• rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)

• rsync: rsync: Authorization bypass via auth users directive parsing (CVE-2026-70463)

• rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)

• rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)

• rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)

• rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)

• rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)

• rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)

• rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)

• rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)

• rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)

Bug Fix(es) and Enhancement(s):

• Fix latest CVEs in rsync in Rocky Linux8 (JIRA:Rocky Linux-256903)

• rsync-3.1.3-27.el8_10 regression: rsync daemon rejects legitimate cross-device symlinks with EXDEV when use chroot = no (JIRA:Rocky Linux-239553)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)
• rsync: rsync: TLS Certificate Validation Bypass allows interception of encrypted sessions (CVE-2026-70454)
• rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)
• rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)
• rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)
• rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)
• rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)
• rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)
• rsync: rsync: Authorization bypass via auth users directive parsing (CVE-2026-70463)
• rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)
• rsync: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (CVE-2026-53791)
• rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)
• rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)
• rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)
• rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)
• rsync: rsync: Memory corruption via out-of-bounds write in size parsing (CVE-2026-70457)
• rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)
• rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)
• rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)
• rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)

Bug Fix(es) and Enhancement(s):

• Rebase rsync to version 3.2.7 in AlmaLinux9 (JIRA:AlmaLinux-248835)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)
• rsync: rsync: TLS Certificate Validation Bypass allows interception of encrypted sessions (CVE-2026-70454)
• rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)
• rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)
• rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)
• rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)
• rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)
• rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)
• rsync: rsync: Authorization bypass via auth users directive parsing (CVE-2026-70463)
• rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)
• rsync: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (CVE-2026-53791)
• rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)
• rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)
• rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)
• rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)
• rsync: rsync: Denial of Service via Zstandard compression thread exhaustion (CVE-2026-70455)
• rsync: rsync: Memory corruption via out-of-bounds write in size parsing (CVE-2026-70457)
• rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)
• rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)
• rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)
• rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)

Bug Fix(es) and Enhancement(s):

• Rebase rsync to version 3.5.0 in AlmaLinux10 (JIRA:AlmaLinux-246094)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)
• rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)
• rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)
• rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)
• rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)
• rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)
• rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)
• rsync: rsync: Authorization bypass via auth users directive parsing (CVE-2026-70463)
• rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)
• rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)
• rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)
• rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)
• rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)
• rsync: rsync: Information disclosure and denial of service via crafted files-from entry (CVE-2026-70461)
• rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)
• rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)
• rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)

Bug Fix(es) and Enhancement(s):

• Fix latest CVEs in rsync in AlmaLinux8 (JIRA:AlmaLinux-256903)
• rsync-3.1.3-27.el8_10 regression: rsync daemon rejects legitimate cross-device symlinks with EXDEV when use chroot = no (JIRA:AlmaLinux-239553)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.

• SECURITY UPDATE: symlink attack on the daemon module-root chdir
  • debian/patches/els/0031-CVE-2026-53784.patch: add safe_open_no_attacker_symlinks() in util.c and confine the daemon module-root chdir under use-chroot=no. els/0006 had hardened only the relative branch of change_dir(); the absolute branch was still on a plain chdir(dir)
  • CVE-2026-53784
• SECURITY UPDATE: information disclosure and arbitrary write via symlinks planted on operator-supplied paths
  • debian/patches/els/0032-CVE-2026-53802-CVE-2026-53803.patch: open the secrets file, "pid file", --config, motd, --password-file, --log-file, --write-batch/--read-batch and the filter, merge-file, --exclude-from/--include-from paths through safe_open_no_attacker_symlinks()
  • debian/patches/els/0037-CVE-2026-53802-files-from.patch: the same for --files-from, which is opened in options.c and which upstream converted separately, in 3ee00e00
  • CVE-2026-53802
  • CVE-2026-53803
• SECURITY UPDATE: arbitrary file write via an absolute --temp-dir or --link-dest whose parent is flipped to a symlink mid-operation
  • debian/patches/els/0033-CVE-2026-53795.patch: confine do_rename() and do_link() in syscall.c through an ownership walk on the pinned parent directory fd
  • debian/patches/els/0039-CVE-2026-53795-exdev.patch: confine the same way the copy_file() opens and the do_unlink() that robust_rename() falls back to when the rename returns EXDEV, i.e. when an absolute --temp-dir or --partial-dir is on another filesystem (upstream bf79a2a0)
  • CVE-2026-53795
• These four CVEs were previously assessed as requiring the 3.5.0 path resolution rewrite (54965efc, defd7110, b62d7ed6) and closed Won't Fix. That assessment was wrong for CVE-2026-53784/53802/53803: upstream fixed them on 2026-06-12 in a7c49e93, f2941575, 9bfa07e3 and 62bf55fc, nine days before the rewrite and independent of it. CVE-2026-53795 does depend on the rewrite; els/0033 covers only the two sinks it names and documents what it leaves out
• SECURITY UPDATE: TOCTOU on the non-daemon receiver's destination chdir
  • debian/patches/els/0034-CVE-2026-53796.patch: resolve the operator-named destination through safe_open_no_attacker_symlinks() + fchdir, for both the absolute and the relative branch of change_dir()
  • CVE-2026-53796
• SECURITY UPDATE: path confinement bypass for a daemon module with a /./ inner boundary marker
  • debian/patches/els/0035-CVE-2026-53793.patch: widen the four daemon symlink-confinement gates from "am_daemon && !am_chrooted" to "am_daemon && (!am_chrooted || module_dirlen)" so an inner module root is treated as the trust boundary
  • debian/patches/els/0040-CVE-2026-53793-basis-paths.patch: extend that boundary to the two alternate-basis paths the gates do not reach -- the generator's alt-dest basis stat (upstream 5ed0ab3f) and the peer-supplied basis xname the receiver joins to an operator basedir (upstream db284e22)
  • CVE-2026-53793
• SECURITY UPDATE: symlink race in the non-daemon sender's source traversal
  • debian/patches/els/0036-CVE-2026-53797.patch: open file content through secure_relative_open() anchored at the transfer root under default symlink handling, so a raced parent symlink cannot redirect the read
  • debian/patches/els/0038-CVE-2026-53797-noatime.patch: apply O_NOATIME in secure_relative_open() as do_open() did, so --noatime keeps working on that open (and on the els/0006 daemon-sender one)
  • CVE-2026-53797
• The three above come from openSUSE's backport of the same upstream commits to rsync 3.2.3 (openSUSE:Leap:15.5:Update/rsync.45907, hardening patches 0108, 0107 and 0100). Four further CVEs from this disclosure remain open …

• SECURITY UPDATE: path traversal when creating intermediate directories
  • debian/patches/CVE-2026-53785.patch: add do_mkdir_at() in syscall.c and route make_path() through it, so each missing directory is created relative to a parent walked one component at a time with O_NOFOLLOW instead of a plain mkdir() on the full path
  • CVE-2026-53785

• CVE-2026-70461: count a trailing backslash when sizing the implied-include filter rule, so a --files-from entry ending in a backslash can no longer write one attacker-controlled byte past the rule's heap allocation
• CVE-2026-70456: reserve the slot read_args() needs for its trailing NULL, so a peer argument count landing exactly on maxargs cannot write one pointer past the argv allocation
• CVE-2026-70458: refuse FLAG_HLINKED when hard links are not in use and on a directory entry, so a peer cannot displace the checksum slot through hard-link extras that were never reserved; gate the hard-link basis check on S_ISREG(file->mode) so a hard-linked symlink or device cannot read a checksum slot it never had; also set sender_keeps_checksum in the daemon-as-sender path so %C cannot log adjacent heap
• CVE-2026-70462: reject a non-positive MSG_IO_TIMEOUT from the peer and cap it at 24 hours, and make set_io_timeout()'s arithmetic overflow-safe, so a crafted server can neither disable the client's --timeout nor spin it at 100% CPU on a negative select() timeout
• CVE-2026-70453: bound the hash_search() chain walk at MAX_CHAIN_LEN, so a basis file whose weak checksums all collide cannot drive an O(file_size * chain_length) scan
• CVE-2026-53785: create each implied parent directory through do_mkdir_at() against a held O_NOFOLLOW directory fd, so a parent component raced into a symlink can no longer place --relative directories outside the destination
• CVE-2026-53794: reject --max-alloc=0, which disabled the per-allocation size cap entirely instead of enforcing a zero one
• CVE-2026-53790: shell-escape %VAR% expansions for their quoting context in the daemon's exec hooks and refuse a peer value holding shell syntax, quote the program names the rsync-ssl helper execs, and widen the remote-shell safe_arg() escape set

• SECURITY UPDATE: Destination-tree escape via symlink following in --relative implied-parent handling
  • debian/patches/CVE-2026-53785.patch: resolve the receiver's destination names one component at a time with O_NOFOLLOW|O_DIRECTORY, acting against a directory fd that is held open, instead of handing the whole name to the kernel to resolve; a component that is a symlink is now refused rather than traversed, so nothing the receiver creates lands at the symlink's target outside the destination tree; adds secure_relative_dirfd(), do_mkdir_at(), do_stat_at(), do_open_at(), do_rename_at(), do_symlink_at(), do_mknod_at() and do_link_at() in syscall.c and routes every way the receiver creates something at a destination name through them -- make_path() in util.c, the four implied-parent sites in generator.c, the install-into-final-name renames in util.c, rsync.c, receiver.c and generator.c, copy_file()'s reopen of the destination on the cross-filesystem fallback, the symlink and mknod creations in generator.c's atomic_create(), and the --link-dest and -H hard links in generator.c and hlink.c; each of those is its own route to the destination name, reached by a different option (--temp-dir bypasses the file create entirely, --devices / --specials and a transferred symlink never touch it, and --link-dest installs a regular file's link from hlink.c but a non-regular file's from generator.c), so confining only some of them leaves the escape open; extends the existing secure_mkstemp() and secure_relative_open() receiver create paths, which the CVE-2026-29518 fix gated on daemon-no-chroot only, to the same confinement; the confinement covers a chrooted daemon serving an inner-module "/./" boundary, whose module root the kernel chroot does not confine, and exempts --keep-dirlinks only for a local receiver, whose documented purpose is to follow a symlinked destination directory -- never for a daemon or for the server side of a push, where the option arrives from the peer; only the confinement this CVE needs is carried, not upstream's whole-tree dirfd-stack resolver, which assumes a source layout this version does not have; defines am_daemon, am_chrooted, am_server, local_server and keep_dirlinks in t_stub.c, which the standalone test harnesses link in place of options.c and main.c, so debian/rules' check target still builds; and adds testsuite/cve-2026-53785.test
  • CVE-2026-53785

• CVE-2026-70456: reserve the slot read_args() needs for its trailing NULL, so a peer argument count landing exactly on maxargs cannot write one pointer past the argv allocation
• CVE-2026-70458: refuse FLAG_HLINKED when hard links are not in use and on a directory entry, so a peer cannot displace the checksum slot through hard-link extras that were never reserved; also set sender_keeps_checksum in the daemon-as-sender path, and skip the content-based basis match for a hard-linked non-regular file, so %C and --compare-dest cannot read a checksum slot that was never allocated
• CVE-2026-70462: reject a non-positive MSG_IO_TIMEOUT from the peer and cap it at 24 hours, and make set_io_timeout()'s arithmetic overflow-safe, so a crafted server can neither disable the client's --timeout nor spin it at 100% CPU on a negative select() timeout
• CVE-2026-70453: bound the hash_search() chain walk at MAX_CHAIN_LEN, so a basis file whose weak checksums all collide cannot drive an O(file_size * chain_length) scan
• CVE-2026-53785: create each implied parent directory through do_mkdir_at() against a held O_NOFOLLOW directory fd, and widen that wrapper's gate from a non-chrooted daemon to any non-chrooted receiver as upstream does, so a parent component raced into a symlink can no longer place --relative directories outside the destination over ssh either
• CVE-2026-53794: reject --max-alloc=0, which disabled the per-allocation size cap entirely instead of enforcing a zero one
• CVE-2026-53790: shell-escape %VAR% expansions for their quoting context in the daemon's exec hooks and refuse a peer value holding shell syntax, quote the program names the rsync-ssl helper execs and restrict the hostname it interpolates into them, refuse a shell-active RSYNC_CONNECT_PROG host, and widen the remote-shell safe_arg() escape set

• CVE-2026-53785: create a transfer's implied parent directories and the generator's directory entries through the symlink-race-safe parent walk, so a symlink planted at a parent component cannot make a non-chrooted receiver create them outside the destination tree
• CVE-2026-53783: complete the els3 fix, which was partial: add --confine-root so a restricted-directory server also refuses the names that arrive over the protocol (file-list names, --files-from lines, filter merge files), and have rrsync pass it; hand rsync a pinned receiver directory option and an existing directory destination as /proc/self/fd/N/. and any other existing destination as its pinned parent plus the leaf, so --partial-dir no longer discards completed files and a push onto an existing file no longer fails

• CVE-2026-53785: create a transfer's implied parent directories and the generator's directory entries through the symlink-race-safe parent walk, so a symlink planted at a parent component cannot make a non-chrooted receiver create them outside the destination tree
• CVE-2026-53783: complete the els3 fix, which was partial: add --confine-root so a restricted-directory server also refuses the names that arrive over the protocol (file-list names, --files-from lines, filter merge files), and have rrsync pass it; hand rsync a pinned receiver directory option and an existing directory destination as /proc/self/fd/N/. and any other existing destination as its pinned parent plus the leaf, so --partial-dir no longer discards completed files and a push onto an existing file no longer fails

• CVE-2026-53785: create a transfer's implied parent directories and the generator's directory entries through the symlink-race-safe parent walk, so a symlink planted at a parent component cannot make a non-chrooted receiver create them outside the destination tree
• CVE-2026-53783: complete the els3 fix, which was partial: add --confine-root so a restricted-directory server also refuses the names that arrive over the protocol (file-list names, --files-from lines, filter merge files), and have rrsync pass it; hand rsync a pinned receiver directory option and an existing directory destination as /proc/self/fd/N/. and any other existing destination as its pinned parent plus the leaf, so --partial-dir no longer discards completed files and a push onto an existing file no longer fails

Several vulnerabilities were discovered in rsync, a fast, versatile, remote (and local) file-copying tool, which could result in local privilege escalation, bypass of intended access restrictions, information disclosure, denial of service or the execution of arbitrary code.

These are all security issues fixed in the rsync-3.5.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for rsync fixes the following issues:

• CVE-2026-53783: rrsync restricted-directory escape (validation-vs-exec race + unsafe option allowlist) (bsc#1269041).
• CVE-2026-53784: Daemon module-root chdir escape under "use chroot = no" (bsc#1269042).
• CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
• CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
• CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
• CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
• CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
• CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
• CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
• CVE-2026-53793: Chroot "/./" inner-module escape via a parent-component symlink (bsc#1269051).
• CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
• CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
• CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (bsc#1269054).
• CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
• CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
• CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (bsc#1269056).
• CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
• CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of-tree disclosure (bsc#1269058).
• CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
• CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
• CVE-2026-70452: hosts deny fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
• CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
• CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
• CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
• CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
• CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
• CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
• CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non-directory transfer root (bsc#1273434).
• CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
• CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
• CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
• CVE-2026-70463: "auth users" ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
• CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).

This update for rsync fixes the following issues:

• CVE-2026-53783: rrsync restricted-directory escape (bsc#1269041).
• CVE-2026-53784: Daemon module-root chdir escape under "use chroot = no" (bsc#1269042).
• CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
• CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
• CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
• CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
• CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
• CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
• CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
• CVE-2026-53793: Chroot "/./" inner-module escape via a parent-component symlink (bsc#1269051).
• CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
• CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
• CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (bsc#1269054).
• CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
• CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
• CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (bsc#1269056).
• CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
• CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of-tree disclosure (bsc#1269058).
• CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
• CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
• CVE-2026-70452: hosts deny fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
• CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
• CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
• CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
• CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
• CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
• CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
• CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non-directory transfer root (bsc#1273434).
• CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
• CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
• CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
• CVE-2026-70463: "auth users" ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
• CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).

This update for rsync fixes the following issues:

• CVE-2026-53783: rrsync restricted-directory escape (validation-vs-exec race + unsafe option allowlist) (bsc#1269041).
• CVE-2026-53784: Daemon module-root chdir escape under "use chroot = no" (bsc#1269042).
• CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
• CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
• CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
• CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
• CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
• CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
• CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
• CVE-2026-53793: Chroot "/./" inner-module escape via a parent-component symlink (bsc#1269051).
• CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
• CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
• CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (TOCTOU) (bsc#1269054).
• CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
• CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
• CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (local privilege escalation) (bsc#1269056).
• CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
• CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of-tree disclosure (bsc#1269058).
• CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
• CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
• CVE-2026-70452: hosts deny fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
• CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
• CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
• CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
• CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
• CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
• CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
• CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non-directory transfer root (bsc#1273434).
• CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
• CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
• CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
• CVE-2026-70463: "auth users" ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
• CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).

This update for rsync fixes the following issues:

• CVE-2026-53783: rrsync restricted-directory escape (validation-vs-exec race + unsafe option allowlist) (bsc#1269041).
• CVE-2026-53784: Daemon module-root chdir escape under "use chroot = no" (bsc#1269042).
• CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
• CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
• CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
• CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
• CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
• CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
• CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
• CVE-2026-53793: Chroot "/./" inner-module escape via a parent-component symlink (bsc#1269051).
• CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
• CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
• CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (bsc#1269054).
• CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
• CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
• CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (bsc#1269056).
• CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
• CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of-tree disclosure (bsc#1269058).
• CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
• CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
• CVE-2026-70452: hosts deny fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
• CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
• CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
• CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
• CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
• CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
• CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
• CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non-directory transfer root (bsc#1273434).
• CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
• CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
• CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
• CVE-2026-70463: "auth users" ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
• CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).

This update for rsync fixes the following issues:

• CVE-2026-53783: rrsync restricted-directory escape (validation-vs-exec race + unsafe option allowlist) (bsc#1269041).
• CVE-2026-53784: Daemon module-root chdir escape under "use chroot = no" (bsc#1269042).
• CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
• CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
• CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
• CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
• CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
• CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
• CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
• CVE-2026-53793: Chroot "/./" inner-module escape via a parent-component symlink (bsc#1269051).
• CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
• CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
• CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (bsc#1269054).
• CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
• CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
• CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (bsc#1269056).
• CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
• CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of-tree disclosure (bsc#1269058).
• CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
• CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
• CVE-2026-70452: hosts deny fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
• CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
• CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
• CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
• CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
• CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
• CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
• CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non-directory transfer root (bsc#1273434).
• CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
• CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
• CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
• CVE-2026-70463: "auth users" ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
• CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).

This update for rsync fixes the following issues:

• CVE-2026-53783: rrsync restricted-directory escape (validation-vs-exec race + unsafe option allowlist) (bsc#1269041).
• CVE-2026-53784: Daemon module-root chdir escape under 'use chroot = no' (bsc#1269042).
• CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
• CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
• CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
• CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
• CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
• CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
• CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
• CVE-2026-53793: Chroot '/./' inner-module escape via a parent-component symlink (bsc#1269051).
• CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
• CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
• CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (TOCTOU) (bsc#1269054).
• CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
• CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
• CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (local privilege escalation) (bsc#1269056).
• CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
• CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of-tree disclosure (bsc#1269058).
• CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
• CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
• CVE-2026-70452: hosts deny fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
• CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
• CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
• CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
• CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
• CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
• CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
• CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non-directory transfer root (bsc#1273434).
• CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
• CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
• CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
• CVE-2026-70463: 'auth users' ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
• CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).

This update for rsync fixes the following issues:

• CVE-2026-53783: rrsync restricted-directory escape (validation-vs-exec race + unsafe option allowlist) (bsc#1269041).
• CVE-2026-53784: Daemon module-root chdir escape under 'use chroot = no' (bsc#1269042).
• CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
• CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
• CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
• CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
• CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
• CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
• CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
• CVE-2026-53793: Chroot '/./' inner-module escape via a parent-component symlink (bsc#1269051).
• CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
• CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
• CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (TOCTOU) (bsc#1269054).
• CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
• CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
• CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (local privilege escalation) (bsc#1269056).
• CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
• CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of-tree disclosure (bsc#1269058).
• CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
• CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
• CVE-2026-70452: hosts deny fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
• CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
• CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
• CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
• CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
• CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
• CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
• CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non-directory transfer root (bsc#1273434).
• CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
• CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
• CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
• CVE-2026-70463: 'auth users' ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
• CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).