Out-of-bounds read in Linux kernel - CVE-2026-80805
Published: September 5, 2026
Vulnerability identifier: #VU147116
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80805
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to read out-of-bounds memory.
The vulnerability exists due to an out-of-bounds read in xfs_attr3_leaf_verify_entry() when validating crafted XFS attribute entries. A local user can provide a crafted name index to read out-of-bounds memory.
Affected software
Linux kernel
How to mitigate CVE-2026-80805
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/03a12253dd2a036545bdb0110a4e0b8dc70f8e7c
- https://git.kernel.org/stable/c/0f82586741e39926542f621bafa424e237a04fa4
- https://git.kernel.org/stable/c/134d82a2b5e3eba3ebf58753a1387b22f26ca1de
- https://git.kernel.org/stable/c/184c1a80421a5b5ddcd262e47980ce2e67fee211
- https://git.kernel.org/stable/c/98a42bb9d60d42898c3494de351a1bf508348cde
- https://git.kernel.org/stable/c/9f92e749fc08b7ff3d9da190c4d1b2273745b282
- https://git.kernel.org/stable/c/b7eea80be25f3334f131d52982b3131aba77b97d
- https://git.kernel.org/stable/c/c35da2bac6f7cb9a9be73f188b4fcc324615c327
- https://git.kernel.org/stable/c/e99120b5944a16d0bc27e52b33de78bcdaaabf5c