NULL pointer dereference in Linux kernel - CVE-2026-43123
Published: May 7, 2026
Vulnerability identifier: #VU130612
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-2026-43123
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 a NULL pointer dereference in fbcon when acquiring new framebuffer console info after fbcon_open() fails. A local user can trigger the vulnerable code path to cause a denial of service.
How to mitigate CVE-2026-43123
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544
- https://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc
- https://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959
- https://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0c
- https://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2c
- https://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59f
- https://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89