CLSA-2026-1789783256
See a problem?- Import Source
- https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789783256.json
- JSON Data
- https://api.osv.dev/v1/vulns/CLSA-2026-1789783256
- Upstream
- Published
- 2026-09-19T02:01:14Z
- Modified
- 2026-10-26T09:43:41Z
- Summary
- rsync: Fix of 7 CVEs
- Details
-
- CVE-2026-70456: reserve the slot read_args() needs for its trailing NULL, so a peer argument count landing exactly on maxargs cannot write one pointer past the argv allocation
- CVE-2026-70458: refuse FLAG_HLINKED when hard links are not in use and on a directory entry, so a peer cannot displace the checksum slot through hard-link extras that were never reserved; also set sender_keeps_checksum in the daemon-as-sender path, and skip the content-based basis match for a hard-linked non-regular file, so %C and --compare-dest cannot read a checksum slot that was never allocated
- CVE-2026-70462: reject a non-positive MSG_IO_TIMEOUT from the peer and cap it at 24 hours, and make set_io_timeout()'s arithmetic overflow-safe, so a crafted server can neither disable the client's --timeout nor spin it at 100% CPU on a negative select() timeout
- CVE-2026-70453: bound the hash_search() chain walk at MAX_CHAIN_LEN, so a basis file whose weak checksums all collide cannot drive an O(file_size * chain_length) scan
- CVE-2026-53785: create each implied parent directory through do_mkdir_at() against a held O_NOFOLLOW directory fd, and widen that wrapper's gate from a non-chrooted daemon to any non-chrooted receiver as upstream does, so a parent component raced into a symlink can no longer place --relative directories outside the destination over ssh either
- CVE-2026-53794: reject --max-alloc=0, which disabled the per-allocation size cap entirely instead of enforcing a zero one
- CVE-2026-53790: shell-escape %VAR% expansions for their quoting context in the daemon's exec hooks and refuse a peer value holding shell syntax, quote the program names the rsync-ssl helper execs and restrict the hostname it interpolates into them, refuse a shell-active RSYNC_CONNECT_PROG host, and widen the remote-shell safe_arg() escape set
- References
-
- https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1789783256.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-53785
- https://nvd.nist.gov/vuln/detail/CVE-2026-53790
- https://nvd.nist.gov/vuln/detail/CVE-2026-53794
- https://nvd.nist.gov/vuln/detail/CVE-2026-70453
- https://nvd.nist.gov/vuln/detail/CVE-2026-70456
- https://nvd.nist.gov/vuln/detail/CVE-2026-70458
- https://nvd.nist.gov/vuln/detail/CVE-2026-70462
Affected packages
TuxCare:AlmaLinux:9.6 / rsync
Package
- Name
- rsync
- Purl
- pkg:rpm/tuxcare/rsync?distro=almalinux-9.6
TuxCare:AlmaLinux:9.6 / rsync-daemon
Package
- Name
- rsync-daemon
- Purl
- pkg:rpm/tuxcare/rsync-daemon?distro=almalinux-9.6