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

drm/vc4: drain the hangcheck timer and works on V3D unbind

Nothing stops the hangcheck timer that submitted jobs arm, or the
job_done_work that the render-done interrupt queues, at teardown:
vc4_irq_disable() cancels only overflow_mem_work, and vc4_gem_destroy()
runs from the drm-managed release, after vc4_v3d_unbind() has already
uninstalled the V3D interrupt and cleared vc4->v3d. A timer still armed
by then reads V3D registers through the NULL vc4->v3d pointer, and the
late callbacks run on the vc4_dev embedding them after it has been
freed.

Drain them in vc4_v3d_unbind(): shut the timer down and cancel
reset_work before the interrupt is taken down, because its
vc4_irq_reset() re-enables it, then flush job_done_work so that
completions queued at teardown still release their jobs.

This issue was found by an in-house static analysis tool.
Published: 2026-10-26
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Mon, 26 Oct 2026 17:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
CWE-476

Mon, 26 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: drm/vc4: drain the hangcheck timer and works on V3D unbind Nothing stops the hangcheck timer that submitted jobs arm, or the job_done_work that the render-done interrupt queues, at teardown: vc4_irq_disable() cancels only overflow_mem_work, and vc4_gem_destroy() runs from the drm-managed release, after vc4_v3d_unbind() has already uninstalled the V3D interrupt and cleared vc4->v3d. A timer still armed by then reads V3D registers through the NULL vc4->v3d pointer, and the late callbacks run on the vc4_dev embedding them after it has been freed. Drain them in vc4_v3d_unbind(): shut the timer down and cancel reset_work before the interrupt is taken down, because its vc4_irq_reset() re-enables it, then flush job_done_work so that completions queued at teardown still release their jobs. This issue was found by an in-house static analysis tool.
Title drm/vc4: drain the hangcheck timer and works on V3D unbind
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-10-26T14:52:02.647Z

Reserved: 2026-09-25T10:25:14.390Z

Link: CVE-2026-99095

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-26T15:16:48.500

Modified: 2026-10-26T15:16:48.500

Link: CVE-2026-99095

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T16:45:14Z

Weaknesses