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CVE-2026-68445

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Prevent shader BO mappings from becoming writable vc4_gem_object_mmap() rejects a writable mapping of a validated shad…

Published Aug 12, 2026EPSS 0.13%

Overview

CVE-2026-68445 is a high-severity vulnerability. It was published on August 12, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/vc4: Prevent shader BO mappings from becoming writable

vc4_gem_object_mmap() rejects a writable mapping of a validated shader

BO, but leaves VM_MAYWRITE set. Userspace can map the BO read-only and

then turn it writable with mprotect().

Validated shader BOs must stay read-only: the validator checks the

instructions once and the GPU trusts them afterwards. A writable

mapping lets userspace rewrite the code after validation, bypassing the

validator.

Clear VM_MAYWRITE on the read-only path so the mapping cannot be

upgraded, as i915 already does for its read-only objects.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/019e6ad247f7fd038d2e009789f6d9bfcccb1ae7Refgit.kernel.org/stable/c/0c9e6367639548307d3f578f6943ce72c9d39087Refgit.kernel.org/stable/c/6deaa317201851c644c431b57682e54d06b35838Refgit.kernel.org/stable/c/9f0ee411fc2d76333d6087c5862ffa907cf7a175Refgit.kernel.org/stable/c/fe168ef1d232d734d9998fd74822e2e20930dfff

How CyberStrike helps

Frequently asked questions

What is CVE-2026-68445?

CVE-2026-68445 is a high-severity vulnerability. It was published on August 12, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-68445?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-68445?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-68445?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-68445 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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