SB20251226131 - Use-after-free in Linux kernel crypto
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226131
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-2023-54046)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the essiv_aead_done() and essiv_aead_crypt() functions in crypto/essiv.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/69c67d451fc19d88e54f7d97e8e7c093e08357e1
- https://git.kernel.org/stable/c/796e02cca30a67322161f0745e5ce994bbe75605
- https://git.kernel.org/stable/c/840a1d3b77c1b062bd62b4733969a5b1efc274ce
- https://git.kernel.org/stable/c/a006aa3eedb8bfd6fe317c3cfe9c86ffe76b2385
- https://git.kernel.org/stable/c/b5a772adf45a32c68bef28e60621f12617161556
- https://git.kernel.org/stable/c/c61e7d182ee3f3f5ecf18a2964e303d49c539b52
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.235