CVE-2026-70461

rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsync daemon module by providing a files-from entry containing both an interior and trailing backslash, causing the add_implied_include() function to under-count the trailing backslash when sizing the destination buffer.

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 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsync daemon module by providing a files-from entry containing both an interior and trailing backslash, causing the add_implied_include() function to under-count the trailing backslash when sizing the destination buffer.

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 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsync daemon module by providing a files-from entry containing both an interior and trailing backslash, causing the add_implied_include() function to under-count the trailing backslash when sizing the destination buffer.

• SECURITY UPDATE: peer-driven one-byte heap out-of-bounds write in add_implied_include() from a files-from entry carrying both an interior and a trailing backslash:
  • debian/patches/els/0009-CVE-2026-70461.patch: count a trailing backslash when sizing the appended-wildcard pattern.
  • CVE-2026-70461.
• SECURITY UPDATE: heap out-of-bounds write in read_args() when the peer's argument count lands exactly on the argv allocation:
  • debian/patches/els/0010-CVE-2026-70456.patch: reserve room for the trailing NULL terminator.
  • CVE-2026-70456.
• SECURITY UPDATE: out-of-bounds write from a file entry marked FLAG_HLINKED that the receiver accepted with hard-link preservation inactive:
  • debian/patches/els/0011-CVE-2026-70458.patch: gate FLAG_HLINKED on preserve_hard_links and exclude directories.
  • CVE-2026-70458.
• SECURITY UPDATE: sender-side out-of-bounds read driven by a malicious receiver's checksum header with a non-zero block count and a zero block length:
  • debian/patches/els/0012-CVE-2026-53792.patch: reject a zero block length in read_sum_head().
  • CVE-2026-53792.
• SECURITY UPDATE: CPU exhaustion in the sending process via quadratic-time behaviour in hash_search(), driven by a malicious receiver's crafted equal-weak-checksum block list. The attacker is the receiver, but the cycles burned are the sender's: hash_search() is reached only through match_sums(), whose sole caller is send_files() in sender.c. NVD's text attributes the CPU to the receiver; the direction stated here is what the code does:
  • debian/patches/els/0013-CVE-2026-70453.patch: bound the per-offset chain walk.
  • CVE-2026-70453.
• SECURITY UPDATE: daemon "hosts deny" failing open when a configured hostname token cannot be resolved:
  • debian/patches/els/0014-CVE-2026-70452.patch: treat an unresolvable deny-list token as a match.
  • CVE-2026-70452.
• SECURITY UPDATE: daemon "auth users" ignoring its documented comma-only parsing, silently discarding a deny rule that names a group whose name contains a space:
  • debian/patches/els/0015-CVE-2026-70463.patch: parse the list with conf_strtok().
  • CVE-2026-70463.
• SECURITY UPDATE: peer-supplied MSG_IO_TIMEOUT disabling the client's own I/O timeout through a non-positive or overflowing value:
  • debian/patches/els/0016-CVE-2026-70462.patch: cap the received value and make set_io_timeout() arithmetic overflow-safe.
  • CVE-2026-70462.
• SECURITY UPDATE: client-supplied --filter merge file bypassing the daemon module filter list:
  • debian/patches/els/0017-CVE-2026-53786.patch: strip the module-dir prefix before the daemon-filter check.
  • CVE-2026-53786.
• SECURITY UPDATE: per-connection daemon child crash on a crafted first incremental file list whose transfer root is a non-directory dot entry:
  • debian/patches/els/0018-CVE-2026-70459.patch: reject a non-directory transfer-root entry and require a dir_flist entry before trusting parent_ndx 0.
  • CVE-2026-70459.
• SECURITY UPDATE: malicious sender widening the receiver's --delete scope beyond the destination subtree via implied-parent reclassification:
  • debian/patches/els/0019-CVE-2026-53789.patch: force implied-parent directories non-content on the receiver, including the synthetic transfer root and the pre-protocol-30 encoding.
  • CVE-2026-53789.
• SECURITY UPDATE: unauthenticated pre-transfer handshake stall holding a per-connection daemon child past the module's max connections limit:
  • debian/patches/els/0020-CVE-2026-70464.patch: bound every peer-controlled handshake read with an absolute deadline and cap the early-protocol argument count.
  • CVE-2026-70464.
• SECURITY UPDATE: command and argument injection…

• 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

• CVE-2026-70461: heap out-of-bounds write in add_implied_include() -- trailing backslash not counted when sizing the implied-include rule

• CVE-2026-70461: heap out-of-bounds write in add_implied_include() -- trailing backslash not counted when sizing the implied-include rule

• CVE-2026-70461: heap out-of-bounds write in add_implied_include() -- trailing backslash not counted when sizing the implied-include rule

• CVE-2026-70461: fix a one-byte heap overflow on a filter argument ending in a backslash, which add_implied_include() did not count when sizing the rule pattern

• CVE-2026-70461: fix a one-byte heap overflow on a filter argument ending in a backslash, which add_implied_include() did not count when sizing the rule pattern

• CVE-2026-70461: fix a one-byte heap overflow on a filter argument ending in a backslash, which add_implied_include() did not count when sizing the rule pattern

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).

Root has patched CVE-2026-70461 in the rsync package for Root:Debian:11. Multiple fixed versions available.

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).