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CVE-2026-68255

Unknown

Last modified

CVE-2026-68255 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

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

VendorProductVersions
LinuxLinux>= 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?
Severity scoring for CVE-2026-68255 is pending analysis.
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