CVE-2026-70458CWE-787

CVE-2026-70458

High · published August 13, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
32.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00396 · 32.6th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-08-13T19:19Z
References (3)
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 · [email protected]https://github.com/RsyncProject/rsync/security/advisories/GHSA-gg3m-4m9m-268h · [email protected]https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-flag-hlinked-handling · [email protected]
EPSS history
Timeline
  • 13 AUG 14:44Z
    rsync 3.0.0 < 3.5.0 Out-of-Bounds Write via FLAG_HLINKED Handling
    cvelistv5