PT-2026-39031 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43370

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Description A use-after-free race condition exists in the drm/amdgpu component during VM acquire. This occurs when parent and child processes sharing a drm file both attempt to acquire the same VM after a fork() operation, caused by a non-atomic assignment to vm->process info.

Recommendations Replace the non-atomic vm->process info assignment with cmpxchg() to ensure atomic operations and prevent the race condition.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-43370

Affected Products

Linux Kernel

References · 17

• https://cve.org/CVERecord?id=CVE-2026-43370 · Security Note
• https://git.kernel.org/stable/c/7885eb335d8f9e9942925d57e300a85e3f82ded4 · Patch
• https://git.kernel.org/stable/c/904025fa8bba1d028adade33346372b4ac1a9249 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43370 · Vendor Advisory
• https://git.kernel.org/stable/c/c658c1c85ec235b7ecfbf8dbfee385b1332088f4 · Patch
• https://ubuntu.com/security/CVE-2026-43370 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43370 · Vendor Advisory
• https://git.kernel.org/stable/c/46d309996bd9251792d7dafdbaf615cf202b4447 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43370 · Security Note
• https://git.kernel.org/stable/c/e61e355cbe49e585097eee28c15b862bfb1c0668 · Patch
• https://git.kernel.org/stable/c/2c1030f2e84885cc58bffef6af67d5b9d2e7098f · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43370 · Vendor Advisory
• https://git.kernel.org/stable/c/ae87aea330c24f462fc7058ed543ba8bc6798447 · Patch
• https://git.kernel.org/stable/c/94b7782d0c8024f5b88454241c8d4777076c3786 · Patch
• https://twitter.com/CVEnew/status/2052811001129582906 · Twitter Post