CVE-2026-23039
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-31

Last updated on: 2026-02-03

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/gud: fix NULL fb and crtc dereferences on USB disconnect On disconnect drm_atomic_helper_disable_all() is called which sets both the fb and crtc for a plane to NULL before invoking a commit. This causes a kernel oops on every display disconnect. Add guards for those dereferences.
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Meta Information
Published
2026-01-31
Last Modified
2026-02-03
Generated
2026-05-07
AI Q&A
2026-01-31
EPSS Evaluated
2026-05-05
NVD
CVE-2026-23039
EUVD
EUVD-2026-5055
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability occurs in the Linux kernel's drm/gud component, where on USB display disconnect, the system calls drm_atomic_helper_disable_all() which sets framebuffer (fb) and CRT controller (crtc) pointers to NULL before committing changes. However, the code did not properly guard against dereferencing these NULL pointers, causing a kernel oops (crash) on every display disconnect. The fix adds checks to prevent dereferencing NULL fb and crtc pointers.


How can this vulnerability impact me? :

This vulnerability can cause the Linux kernel to crash (kernel oops) whenever a USB display is disconnected. This can lead to system instability, potential data loss, and disruption of services relying on the display subsystem.


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