Type Confusion in Linux kernel - CVE-2026-93112
Published: September 18, 2026
Vulnerability identifier: #VU150901
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-93112
CWE-ID: CWE-843
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-93112
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3