CVE-2026-68253
In the Linux kernel, the following vulnerability has been resolved:
drm/i915/hdcp: check streams[] bounds before overflow
The data->streams[] overflow check is done after the buffer overflow has
already happened. Move the overflow check before the write.
Side note, emitting a warning splat with a backtrace might be overkill
here, but prefer not changing the behaviour other than not doing the
overrun.
Discovered using AI-assisted static analysis confirmed by Intel Product
Security.
(cherry picked from commit 9284ab3b6e776c315883ac2611283d263c9460fd)
CSIRTS triage
- 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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Exploitation outlook
- Low exploitation risk0.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
Advisory coverage (3)
- unknownDSA-6466-1 linux - security updatedebian · 2026-08-25
- mediumCVE-2026-68253: drm/i915/hdcp: check streams[] bounds before overflowmsrc · 2026-08-11
- highCVE-2026-68253: In the Linux kernel, the following vulnerability has been resolved: drm/i915/hdcp: check strea…nvd · 2026-08-10
External references
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