PT-2026-5542 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-01-31 · CVE-2026-23039

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel’s DRM/GUD subsystem. Specifically, a NULL pointer dereference can occur on display disconnect due to the drm atomic helper disable all() function setting the framebuffer (fb) and CRTC for a plane to NULL before a commit operation. This results in a kernel oops when a display is disconnected. The issue arises from missing checks for these NULL pointers.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Related Identifiers

CVE-2026-23039

Affected Products

Linux Kernel

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23039.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23039 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23039 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23039 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23039 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23039 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23039 · Security Note
• https://ubuntu.com/security/CVE-2026-23039 · Vendor Advisory
• https://git.kernel.org/linus/dc2d5ddb193e363187bae2ad358245642d2721fb · Note
• https://git.kernel.org/stable/c/a255ec07f91d4c73a361a28b7a3d82f5710245f1 · Note
• https://twitter.com/CVEnew/status/2017567074525020390 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2017575011754606636 · Twitter Post
• https://t.me/CVEtracker/43399 · Telegram Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/stable/c/dc2d5ddb193e363187bae2ad358245642d2721fb · Note