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CVE-2026-68255

7.7 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: bound EDID block reads to the response buffer virtio_get_edid_block() validates the read offset only against the de…

Published Aug 10, 2026EPSS 0.19%

Overview

CVE-2026-68255 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

drm/virtio: bound EDID block reads to the response buffer

virtio_get_edid_block() validates the read offset only against the

device-supplied resp->size field, never against the fixed-size resp->edid

array. The EDID block index is driven by the device-supplied extension

count, so a malicious virtio-gpu backend can advertise a large size

together with a high block count and read far past the array into adjacent

kernel memory, which is then surfaced in the parsed EDID (an out-of-bounds

read / info leak).

Also reject any read whose end exceeds the size of the edid array.

Conforming EDID responses stay within the array and are unaffected.

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/2757e6e803092cf0aeaf4b735e16b5d3bdc705c5Refgit.kernel.org/stable/c/35be0e2c6862abcd5e5f5445261f1fd910d4a9b4Refgit.kernel.org/stable/c/375c1934ef0196d3b6d3a1eae3232bef8dae7bf7Refgit.kernel.org/stable/c/3f506a85a905b080cadc029a1651a310479090a6Refgit.kernel.org/stable/c/4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccdRefgit.kernel.org/stable/c/64bedd2758eccbc74d39f7006a7ec16fa39dc901Refgit.kernel.org/stable/c/65ce911f341ad8ff0c08922eff5bb6db75666eb0Refgit.kernel.org/stable/c/9fc2a017c5d597937e0c28b9a9669844aa796c42

How CyberStrike helps

Frequently asked questions

What is CVE-2026-68255?

CVE-2026-68255 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-68255?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-68255?

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-2026-68255?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-68255 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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