CVE-2026-74638: drm/v3d: Serialize the scheduler timeout handlers

mediumCVSS 4.7CVE-2026-74638

CSIRTS triage

vendor: Linux product: Linux kernel Denial of service

What: Missing serialization of scheduler timeout handlers in the DRM v3d driver can cause race conditions.
Who is affected: Systems running vulnerable Linux kernel versions with DRM v3d GPU driver enabled.
Urgency: Medium priority; not currently exploited but unserialized timeouts can cause GPU hangs or crashes.
Action: Apply kernel patch serializing v3d scheduler timeout handlers in drivers/gpu/drm/v3d or update to patched kernel version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.7
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74638

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-746380.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74638	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for drm/v3d

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-74638: In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Serialize the sch…nvd · 2026-08-22
unknownCVE-2026-72327: In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Reject invalid in…nvd · 2026-08-15
highCVE-2026-64099: In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Fix use-after-fre…nvd · 2026-07-19
mediumCVE-2026-53139: drm/v3d: Skip CSD when it has zeroed workgroupsmsrc · 2026-06-09
mediumCVE-2026-46314: drm/v3d: Reject empty multisync extension to prevent infinite loopmsrc · 2026-06-09