Buffer overflow in Linux kernel - CVE-2022-50640
Published: December 10, 2025 / Updated: December 12, 2025
Vulnerability identifier: #VU119771
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2022-50640
CWE-ID: CWE-119
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 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.
How to mitigate CVE-2022-50640
Install update from vendor's repository.
Sources
- 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