SB20251230255 - Improper locking in Linux kernel video fbdev driver
Published: December 30, 2025 Updated: December 30, 2025
Security Bulletin ID
SB20251230255
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2023-54277)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the dlfb_usb_probe() and dlfb_alloc_urb_list() functions in drivers/video/fbdev/udlfb.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1522dc58bff87af79461b96d90ec122e9e726004
- https://git.kernel.org/stable/c/58ecc165abdaed85447455e6dc396758e8c6f219
- https://git.kernel.org/stable/c/9e12c58a5ece41be72157cef348576b135c9fc72
- https://git.kernel.org/stable/c/c8fdf7feca77cd99e25ef0a1e9e72dfc83add8ef
- https://git.kernel.org/stable/c/e19383e5dee5adbf3d19f3f210f440a88d1b7dde
- https://git.kernel.org/stable/c/ed9de4ed39875706607fb08118a58344ae6c5f42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.181
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.114
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.244
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.31
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4