Type Confusion in Linux kernel - CVE-2026-90177
Published: September 19, 2026
Vulnerability identifier: #VU151308
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90177
CWE-ID: CWE-843
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass pointer type verification.
The vulnerability exists due to improper pointer type validation in the BPF verifier's atomic read-modify-write verification when verifying atomic read-modify-write instructions. A local user can route an atomic read-modify-write instruction through paths with incompatible destination pointer types to bypass pointer type verification.
Affected software
Linux kernel
How to mitigate CVE-2026-90177
Install security update from vendor's repository.