Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-gg3m-4m9m-268h
- https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-flag-hlinked-
FAQ
What is CVE-2026-70458?
CVE-2026-70458 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 ...
How severe is CVE-2026-70458?
CVE-2026-70458 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-70458?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.