SB20260918107 - Type Confusion in Linux kernel include scx
Published: September 18, 2026
Security Bulletin ID
SB20260918107
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Type Confusion (CVE-ID: CVE-2026-93112)
CWE-ID: CWE-843 - Type confusion
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to modify cpumask data intended to be read-only.
The vulnerability exists due to improper type enforcement in the bpf_cpumask_populate() BPF kfunc when a BPF program passes a borrowed cpumask pointer returned by a read-only kfunc as the destination. A local user can invoke bpf_cpumask_populate() with the borrowed pointer to modify cpumask data intended to be read-only.
Remediation
Install update from vendor's website.