CVE-2026-68271: drm/nouveau: fix reversed error cleanup order in ucopy functions

mediumCVSS 5.5CVE-2026-68271

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Reversed error cleanup order in DRM nouveau ucopy functions causes resource leaks or use-after-free.
Who is affected: Systems running affected Linux kernel versions with nouveau GPU driver.
Urgency: Medium severity; not exploited yet but memory corruption could lead to privilege escalation or denial of service.
Action: Apply Linux kernel patch fixing ucopy error cleanup order in nouveau driver.

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 5.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68271

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-2026-682710.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68271	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/nouveau

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-2026-68271: In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix reversed …nvd · 2026-08-10