SB2026030454 - Use-after-free in Linux kernel netfilter
Published: March 4, 2026
Security Bulletin ID
SB2026030454
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-2026-23231)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nf_tables_addchain() 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/2a6586ecfa4ce1413daaafee250d2590e05f1a33
- https://git.kernel.org/stable/c/2f9a4ffeb763aec822f8ff3d1e82202d27d46d4b
- https://git.kernel.org/stable/c/7017745068a9068904e1e7a1b170a5785647cc81
- https://git.kernel.org/stable/c/71e99ee20fc3f662555118cf1159443250647533
- https://git.kernel.org/stable/c/dbd0af8083dd201f07c49110b2ee93710abdff28
- https://git.kernel.org/stable/c/f3fe58ce37926a10115ede527d59b91bcc05400a