CVE-2026-68253 drm/i915/hdcp: check streams[] bounds before overflow
A buffer overflow in the Linux kernel's i915 HDCP driver allows attackers to corrupt memory, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68253?
CVE-2026-68253 is a high-severity memory corruption vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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)
Weakness: CWE-787
Which versions are affected by CVE-2026-68253?
How do I fix CVE-2026-68253?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-68253 being exploited?
There is no known exploitation of CVE-2026-68253 in the wild and no public exploit code.
Sources
Also known as AZL-94842, BELL-CVE-2026-68253, DEBIAN-CVE-2026-68253, GHSA-9cgm-8fj5-jh9j, UBUNTU-CVE-2026-68253.