SB20251230157 - Use-after-free in Linux kernel ipv6 netfilter
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230157
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-2023-54243)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the __do_replace() function in net/ipv6/netfilter/ip6_tables.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3dd6ac973351308d4117eda32298a9f1d68764fd
- https://git.kernel.org/stable/c/9060abce3305ab2354c892c09d5689df51486df5
- https://git.kernel.org/stable/c/cda0e0243bd3c04008fcd37a46b0269fb3c49249
- https://git.kernel.org/stable/c/dbb3cbbf03b3c52cb390fabec357f1e4638004f5
- https://git.kernel.org/stable/c/e58a171d35e32e6e8c37cfe0e8a94406732a331f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.173
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.100
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3