Input validation error in Linux kernel - CVE-2021-47641
Published: February 26, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU104729
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47641
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2021-47641
Install update from vendor's website.
Sources
- 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