SB20250226562 - Input validation error in Linux kernel video fbdev driver
Published: February 26, 2025 Updated: May 11, 2025
Security Bulletin ID
SB20250226562
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) Input validation error (CVE-ID: CVE-2021-47641)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the cirrusfb_check_mclk() and cirrusfb_check_pixclock() functions in drivers/video/fbdev/cirrusfb.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/1d3fb46439ad4e8f0c5739eb33d1875ac9e0f135
- https://git.kernel.org/stable/c/40b13e3d85744210db13457785646634e2d056bd
- https://git.kernel.org/stable/c/45800c42ef000f417270bcfc08630e42486fca99
- https://git.kernel.org/stable/c/53a2088a396cfa1da92690a1da289634cd73bf0d
- https://git.kernel.org/stable/c/5c6f402bdcf9e7239c6bc7087eda71ac99b31379
- https://git.kernel.org/stable/c/6fe23ff94e7840097202e85c148688940b37c9b1
- https://git.kernel.org/stable/c/8c7e2141fb89c620ab4e41512e262fbf25b8260d
- https://git.kernel.org/stable/c/c656d04247a2654ede5cead2ecbf83431dad5261
- https://git.kernel.org/stable/c/e498b504f8c81b07efab9febf8503448de4dc9cf
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.2