CVE-2026-68255 in Linux
Riassunto
di MITRE • 10/08/2026
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.
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