rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf truncates the formatted size string, the return value equals the number of characters that would have been written including the truncated portion, and this value may exceed the array length. The subsequent indexed write targets memory outside the intended array bounds, corrupting .bss memory.
Fix
Patch, vendor advisory and mitigation references on NVD 1
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.3 · sambaNVD modified 2026-10-23 18:10
Affected (CPE criteria) 1
cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*
References 3
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 Product, Release Notes
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-pg7g-xqmr-xpfh Vendor Advisory
- https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-parse-size-arg Release Notes, Third Party Advisory