What is CVE-2026-68255?

CVE-2026-68255 is a High severity Linux kernel vulnerability with a CVSS score of 7.7 out of 10, affecting Linux kernel versions from 5.0 onward and patched in 5.10.266, 5.15.217, 6.1.183 and others. CVE-2026-68255 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-68255?

CVE-2026-68255 has a CVSS score of 7.7 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2026-68255?

Yes, CVE-2026-68255 has been patched. Fixed versions include 5.10.266, 5.15.217, 6.1.183 and others. If you are running Linux kernel 5.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-68255 actively exploited?

CVE-2026-68255 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-68255

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 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.

Package Linux Kernel

Published 2026-08-10

Last modified 2026-08-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.7

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected versions

Linux kernel versions 5.0 and later are affected. Fixed in 5.10.266, 5.15.217, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2 and their respective stable series.

Affected from

≥ 5.0

Fixed in

✓ 5.10.266 5.10.x ✓ 5.15.217 5.15.x ✓ 6.1.183 6.1.x ✓ 6.6.148 6.6.x ✓ 6.12.101 6.12.x ✓ 6.18.42 6.18.x ✓ 7.1.6 7.1.x ✓ 7.2

References

8 total

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-68255

Severity High

CVSS score 7.7 / 10

CVSS version 3.1

Published 2026-08-10

Modified 2026-08-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-68255?

CVE-2026-68255 is a High severity Linux kernel vulnerability with a CVSS score of 7.7 out of 10 . It affects Linux kernel versions from 5.0 onward and has been patched in 5.10.266, 5.15.217, 6.1.183 and others. CVE-2026-68255 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-68255?

CVE-2026-68255 has a CVSS score of 7.7 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2026-68255?

Yes. CVE-2026-68255 has been patched. Fixed versions include 5.10.266, 5.15.217, 6.1.183 and others. If you are running Linux kernel 5.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-68255 actively exploited?

No. CVE-2026-68255 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.