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CVE-2026-68253: drm/i915/hdcp: check streams[] bounds before overflow

mediumCVSS 5.5CVE-2026-68253

CSIRTS triage

vendor: Linuxproduct: Linux kernelMemory corruption
What
The i915 HDCP driver fails to check array bounds before accessing streams[], enabling buffer overflow.
Who is affected
Linux systems with Intel graphics and HDCP content protection enabled.
Urgency
Medium priority; CVSS 5.5 buffer overflow risk warrants timely patching.
Action
Update to a patched Linux kernel version containing the fix for CVE-2026-68253.

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-2026-68253

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-68253coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for drm/i915/hdcp

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.

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