SB2025120888 - NULL pointer dereference in Linux kernel f2fs
Published: December 8, 2025 Updated: December 12, 2025
Security Bulletin ID
SB2025120888
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) NULL pointer dereference (CVE-ID: CVE-2022-50620)
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.
Remediation
Install update from vendor's website.
References
- 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