CVE-2026-53799

rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call. Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended destination tree, potentially granting elevated permissions and enabling local privilege escalation.

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…

rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call. Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended destination tree, potentially granting elevated permissions and enabling local privilege escalation.

rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call. Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended destination tree, potentially granting elevated permissions and enabling local privilege escalation.

• CVE-2026-53797: open the file the sender transmits through a descriptor resolved beneath the transfer root so a parent component raced into a symlink cannot redirect the read out of the tree
• CVE-2026-53798: reject an empty or non-numeric daemon name-converter reply instead of letting atol("") collapse it to uid/gid 0, and refuse control characters in the token sent to the converter
• CVE-2026-53799: pin the destination inode once in set_file_attrs() and set the ACLs, xattrs and mode through that descriptor so a leaf swapped after the content was written cannot redirect the metadata onto another file
• CVE-2026-53800: unlink a transferred source file through a descriptor held on its parent directory so --remove-source-files cannot be raced into removing a file outside the transfer root
• CVE-2026-53801: enumerate each source directory through a descriptor resolved beneath the transfer root and stat its entries through that descriptor so a parent raced into a symlink cannot make the scan list a directory outside the module

• 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 …

• CVE-2026-53799: pin each received entry with a per-component O_NOFOLLOW walk and apply ACLs/xattrs against the held descriptor, so a local user who races the entry or a parent into a symlink cannot redirect an attacker-chosen ACL onto an inode outside the destination tree; a pin that fails where confinement was expected refuses the operation instead of writing by path NOTE: --keep-dirlinks into a destination whose path crosses a directory symlink is now refused (exit 23) rather than applying metadata through it

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).