SB2025120852 - Use-after-free in Linux kernel tty vt driver
Published: December 8, 2025 Updated: December 12, 2025
Security Bulletin ID
SB2025120852
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-2023-53747)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the vcs_write() function in drivers/tty/vt/vc_screen.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0deff678157333d775af190f84696336cdcccd6d
- https://git.kernel.org/stable/c/11dddfbb7a4e62489b01074d6c04d9d1b42e4047
- https://git.kernel.org/stable/c/1de42e7653d6714a7507ba6696151a1fa028c69f
- https://git.kernel.org/stable/c/3338d0b9acde770ee588eead5cac32c25e7048fc
- https://git.kernel.org/stable/c/8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357
- https://git.kernel.org/stable/c/934de9a9b659785fed3e820bc0c813a460c71fea
- https://git.kernel.org/stable/c/a4e3c4c65ae8510e01352c9a4347e05c035b2ce2
- https://git.kernel.org/stable/c/e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.113