CVE-2026-70458rsync 3.0.0 < 3.5.0 Out-of-Bounds Write via FLAG_HLINKED Handling

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-gg3m-4m9m-268h) vendor-advisoryVendor Advisory
• rsync 3.5.0 Release Notes release-notesRelease Notes
• https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-flag-hlinked-handling third-party-advisoryThird Party Advisory