SB20260213152 - Use-after-free in Linux kernel netfilter
Published: February 13, 2026
Security Bulletin ID
SB20260213152
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-23111)
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.
Remediation
Install update from vendor's website.
References
- 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