CVE-2026-68255

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

State: Published
Severity: 7.7 High
Published: Aug 10, 2026
Updated: Oct 19, 2026
Reserved: Jul 30, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	Linux

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
LinuxLinux	b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 65ce911f341ad8ff0c08922eff5bb6db75666eb0Affected b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 64bedd2758eccbc74d39f7006a7ec16fa39dc901Affected b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 3f506a85a905b080cadc029a1651a310479090a6Affected b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 9fc2a017c5d597937e0c28b9a9669844aa796c42Affected b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5Affected b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4Affected b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7Affected b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccdAffected
LinuxLinux	5.0Affected before 5.0Not affected 5.10.266 through 5.10.Not affected 5.15.217 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 65ce911f341ad8ff0c08922eff5bb6db75666eb0Affected
b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 64bedd2758eccbc74d39f7006a7ec16fa39dc901Affected
b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 3f506a85a905b080cadc029a1651a310479090a6Affected
b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 9fc2a017c5d597937e0c28b9a9669844aa796c42Affected
b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5Affected
b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4Affected
b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7Affected
b4b01b4995fb15b55a2d067eb405917f5ab32709 to before 4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccdAffected

LinuxLinux

5.0Affected
before 5.0Not affected
5.10.266 through 5.10.*Not affected
5.15.217 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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