CVE-2026-68436: drm/amd/display: use kvzalloc to allocate struct dc

mediumCVSS 4.1CVE-2026-68436

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: The drm/amd/display code allocates struct dc without using kvzalloc, risking memory issues under pressure.
Who is affected: Systems running affected Linux kernel versions with AMD display hardware.
Urgency: Medium severity (CVSS 4.1); potential memory corruption or DoS under specific conditions.
Action: Apply the kernel patch to use kvzalloc for struct dc allocation.

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 4.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68436

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-2026-684360.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68436	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/amd/display

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-2026-74732: In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check for…nvd · 2026-08-22
highCVE-2026-74449: In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix divid…nvd · 2026-08-15
unknownCVE-2026-68436: In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: use kvzal…nvd · 2026-08-12
lowCVE-2026-68256: drm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink referenc…msrc · 2026-08-11
mediumCVE-2026-74732: drm/amd/display: Check for tg ops in dce110_set_avmutemsrc · 2026-08-11
criticalCVE-2026-68364: drm/amd/display: Fix ISM dc_lock deadlock during suspendmsrc · 2026-08-11