CVE-2026-70458
rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.
- Score
- CVSS 4.0 8.8 High
- Status
- Awaiting Analysis - disclosure@vulncheck.com
- Published
- 2026-08-13
- Last modified
- 2026-10-24
- Weaknesses
- CWE-787
Affected products
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-gg3m-4m9m-268h
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-flag-hlinked-handling
