NULL pointer dereference in Linux kernel - CVE-2026-45848
Published: May 28, 2026
Vulnerability identifier: #VU132640
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45848
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in aa_sock_file_perm when handling socket setup or teardown. A local user can trigger the vulnerable code path to cause a denial of service.
The issue is reachable for older af_unix mediation and other socket types.
How to mitigate CVE-2026-45848
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/00b67657535dfea56e84d11492f5c0f61d0af297
- https://git.kernel.org/stable/c/0dc19bca22606f7a61d5988408f74e3ae0ef3486
- https://git.kernel.org/stable/c/3852eb9a0392eb435c03dcb47d581bcfe6a9a95b
- https://git.kernel.org/stable/c/5121b7283f1c46e4c06b88b1dda7b064429d77de
- https://git.kernel.org/stable/c/68538ec34fcb4194c7961dc4eca6f5537fec8067
- https://git.kernel.org/stable/c/8a0ededbfcff74598f82f1d4b8ef9db28878b317
- https://git.kernel.org/stable/c/c11b7c3280d000376e27ebfed17ec7046699eab4
- https://git.kernel.org/stable/c/ccb66a3c6c8f51b3ed1bc003b70bb9ff99e8d835