SB20251210143 - Buffer overflow in Linux kernel mmc core driver
Published: December 10, 2025 Updated: December 12, 2025
Security Bulletin ID
SB20251210143
CSH 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 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2022-50640)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to memory corruption within the sdio_release_func() function in drivers/mmc/core/sdio_bus.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1e8cd93ae536581562bab4e1d8c5315bbc2548bf
- https://git.kernel.org/stable/c/1fb79478695d92bab1c120ad3dad05252b02a29d
- https://git.kernel.org/stable/c/66d461a92f32b6995b630625d350259b6b1f961b
- https://git.kernel.org/stable/c/7a09c64b7da0abdec3919812e3d93ecc44069ed0
- https://git.kernel.org/stable/c/8bf037279b5869ae9331c42bb1527d2680ebba96
- https://git.kernel.org/stable/c/9972e6b404884adae9eec7463e30d9b3c9a70b18
- https://git.kernel.org/stable/c/b3275dde570b6420106a715bb58a0af041b94d95
- https://git.kernel.org/stable/c/b8b2965932e702b21e335ff30e1bb550f5a23b6f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.332