SB2025120859 - Use-after-free in Linux kernel
Published: December 8, 2025
Security Bulletin ID
SB2025120859
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-2025-40323)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the include/linux/fbcon.h. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/468f78276a37f4c6499385a4ce28f4f57be6655d
- https://git.kernel.org/stable/c/4ac18f0e6a6d599ca751c4cd98e522afc8e3d4eb
- https://git.kernel.org/stable/c/a1f3058930745d2b938b6b4f5bd9630dc74b26b7
- https://git.kernel.org/stable/c/c079d42f70109512eee49123a843be91d8fa133f
- https://git.kernel.org/stable/c/de89d19f4f30d9a8de87b9d08c1bd35cb70576d8