Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-68255

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
10/08/2026
Last modified:
17/08/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/virtio: bound EDID block reads to the response buffer<br /> <br /> virtio_get_edid_block() validates the read offset only against the<br /> device-supplied resp-&gt;size field, never against the fixed-size resp-&gt;edid<br /> array. The EDID block index is driven by the device-supplied extension<br /> count, so a malicious virtio-gpu backend can advertise a large size<br /> together with a high block count and read far past the array into adjacent<br /> kernel memory, which is then surfaced in the parsed EDID (an out-of-bounds<br /> read / info leak).<br /> <br /> Also reject any read whose end exceeds the size of the edid array.<br /> Conforming EDID responses stay within the array and are unaffected.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.70 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x
7.70
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools