Use-after-free in Linux kernel - CVE-2026-23111
Published: February 13, 2026
Vulnerability identifier: #VU122832
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23111
CWE-ID: CWE-416
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nft_map_catchall_activate() function in net/netfilter/nf_tables_api.c. A local user can escalate privileges on the system.
How to mitigate CVE-2026-23111
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1444ff890b4653add12f734ffeffc173d42862dd
- https://git.kernel.org/stable/c/42c574c1504aa089a0a142e4c13859327570473d
- https://git.kernel.org/stable/c/8b68a45f9722f2babe9e7bad00aa74638addf081
- https://git.kernel.org/stable/c/8c760ba4e36c750379d13569f23f5a6e185333f5
- https://git.kernel.org/stable/c/b9b6573421de51829f7ec1cce76d85f5f6fbbd7f
- https://git.kernel.org/stable/c/f41c5d151078c5348271ffaf8e7410d96f2d82f8