Improper access control in Linux kernel - CVE-2026-93144
Published: September 18, 2026
Vulnerability identifier: #VU150861
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-2026-93144
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass read-only restrictions on untrusted BTF pointers.
The vulnerability exists due to improper access control in check_ptr_to_btf_access() in the BPF verifier when validating write accesses through untrusted BTF pointers. A local user can load a BPF program that performs a write through an untrusted BTF pointer to bypass read-only restrictions on untrusted BTF pointers.
Affected software
Linux kernel
How to mitigate CVE-2026-93144
Install security update from vendor's repository.