NULL pointer dereference in Linux kernel - CVE-2022-50620
Published: December 8, 2025 / Updated: December 12, 2025
Vulnerability identifier: #VU119330
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-2022-50620
CWE-ID: CWE-476
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 NULL pointer dereference within the f2fs_start_discard_thread() function in fs/f2fs/segment.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2022-50620
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/865bb7b5a7deeb0e5afbd82381d52d38825dc64d
- https://git.kernel.org/stable/c/91586ce0d39a05f88795aa8814fb99b1387236b3
- https://git.kernel.org/stable/c/a3e517a6ba695d683ee63615e1ea6e6b4c7d2732
- https://git.kernel.org/stable/c/ae6c960a82c52c3bda5adc82d90643d6c12d308e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.2