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CVE-2026-68255

HIGHCVSS 7.7/10EPSS 0.19%

Last modified

CVE-2026-68255 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.7/10

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

EPSS Probability
0.19%

9.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 65ce911f341ad8ff0c08922eff5bb6db75666eb0; >= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 64bedd2758eccbc74d39f7006a7ec16fa39dc901; >= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 3f506a85a905b080cadc029a1651a310479090a6; >= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 9fc2a017c5d597937e0c28b9a9669844aa796c42; >= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5; >= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4; >= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7; >= b4b01b4995fb15b55a2d067eb405917f5ab32709, < 4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd
LinuxLinux5.0

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68255?
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.
How severe is CVE-2026-68255?
CVE-2026-68255 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2026-68255?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST