Out-of-bounds read in Linux kernel - CVE-2026-64318
Published: July 27, 2026
Vulnerability identifier: #VU139656
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-2026-64318
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the aix partition parser when scanning the physical-partition-extent array from a crafted AIX/IBM partition table. A local user can supply a crafted block-device image to disclose sensitive information.
The issue can be triggered during partition scanning without mounting the filesystem, including when a crafted image is attached with partition scanning enabled or when a device is auto-scanned by udev.
Affected software
Linux kernel
How to mitigate CVE-2026-64318
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/09861651617ba0fec089e8b9477439e68398c110
- https://git.kernel.org/stable/c/2dc0bfd2fe355fb930de63c2f2eb8ced8570c579
- https://git.kernel.org/stable/c/44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e
- https://git.kernel.org/stable/c/4671bb74bba05fdd4acf670a35758c29e8c97b83
- https://git.kernel.org/stable/c/5eacdb1967378f5e5591cd27a2d8cdee2df1a599
- https://git.kernel.org/stable/c/b5e9c09309e18fd9839ad007c238120353ca0cc4
- https://git.kernel.org/stable/c/ce93228e2193a17d2c58b656e439bb39fe5c3af8
- https://git.kernel.org/stable/c/fd94a779020f2ecc8b2607f4c20b34acb1763b9a