SB2025091874 - NULL pointer dereference in Linux kernel sched
Published: September 18, 2025 Updated: September 22, 2025
Security Bulletin ID
SB2025091874
CSH 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 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2022-50356)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 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
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the sfb_reset() function in net/sched/sch_sfb.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/2a3fc78210b9f0e85372a2435368962009f480fc
- https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333
- https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745
- https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.152