NULL pointer dereference in Linux kernel - CVE-2026-53227
Published: June 26, 2026
Vulnerability identifier: #VU135546
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-53227
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an invalid pointer dereference in the openvswitch datapath flow command handler when handling crafted flow set operations after a reply skb allocation failure. A local user can trigger the error-handling path to cause a denial of service.
How to mitigate CVE-2026-53227
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d
- https://git.kernel.org/stable/c/25fdf53698535fe8790237f5a8a9626791429785
- https://git.kernel.org/stable/c/895d1dd9057cde1687fa0f4286d47ceed0b82997
- https://git.kernel.org/stable/c/971b1b37774f13acc5add0a2843f8598446b8598
- https://git.kernel.org/stable/c/e248fb2e680deb2bd37bac551b72638fe4938a76
- https://git.kernel.org/stable/c/e3d509a1b71396e1452060dbf84a805fd1c3c549
- https://git.kernel.org/stable/c/ecc55aad3390129a87106841f4b68bf3d70c9264
- https://git.kernel.org/stable/c/ee30dd2909d8b98619f4341c70ec8dc8e155ab02