# CVE-2025-38356: drm/xe/guc: Explicitly exit CT safe mode on unwind

Status: published. Published: 2025-07-25. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/guc: Explicitly exit CT safe mode on unwind

During driver probe we might be briefly using CT safe mode, which
is based on a delayed work, but usually we are able to stop this
once we have IRQ fully operational.  However, if we abort the probe
quite early then during unwind we might try to destroy the workqueue
while there is still a pending delayed work that attempts to restart
itself which triggers a WARN.

This was recently observed during unsuccessful VF initialization:

 [ ] xe 0000:00:02.1: probe with driver xe failed with error -62
 [ ] ------------[ cut here ]------------
 [ ] workqueue: cannot queue safe_mode_worker_func [xe] on wq xe-g2h-wq
 [ ] WARNING: CPU: 9 PID: 0 at kernel/workqueue.c:2257 __queue_work+0x287/0x710
 [ ] RIP: 0010:__queue_work+0x287/0x710
 [ ] Call Trace:
 [ ]  delayed_work_timer_fn+0x19/0x30
 [ ]  call_timer_fn+0xa1/0x2a0

Exit the CT safe mode on unwind to avoid that warning.

(cherry picked from commit 2ddbb73ec20b98e70a5200cb85deade22ccea2ec)

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 09b286950f2911615694f4a1ff491efe9ed5eeba; < 6d0b588614c43d6334b2d7a70a99f31f7b14ecc0 (affected, git); ≥ 09b286950f2911615694f4a1ff491efe9ed5eeba; < f161e905b08ae8a513c5a36a10e3163e9920cfe6 (affected, git); ≥ 09b286950f2911615694f4a1ff491efe9ed5eeba; < ad40098da5c3b43114d860a5b5740e7204158534 (affected, git). Source: CNA: Linux
- Linux / Linux: 6.11 (affected); ≥ 0; < 6.11 (unaffected, semver); ≥ 6.12.37; ≤ 6.12.* (unaffected, semver); ≥ 6.15.5; ≤ 6.15.* (unaffected, semver); ≥ 6.16; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.19% as of 2026-11-05; percentile 8.35%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/6d0b588614c43d6334b2d7a70a99f31f7b14ecc0 (CNA: Linux)

- https://git.kernel.org/stable/c/f161e905b08ae8a513c5a36a10e3163e9920cfe6 (CNA: Linux)

- https://git.kernel.org/stable/c/ad40098da5c3b43114d860a5b5740e7204158534 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2025-38356; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-38356; retrieved 2026-11-05; source updated Not reported

Revision: 50ba788537864f73cc3b953d7bebb5afcd57d53e8f1b6b8e69d9cab8cc5f8de9

Canonical: https://y2.dev/cve/CVE-2025-38356

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