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CVE-2026-68255

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.266, 5.15.217, 6.1.183, 6.6.148, 6.12.101, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 65ce911f341ad8ff0c08922eff5bb6db75666eb0; From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 64bedd2758eccbc74d39f7006a7ec16fa39dc901; From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 3f506a85a905b080cadc029a1651a310479090a6; From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 9fc2a017c5d597937e0c28b9a9669844aa796c42; From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5; From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4; From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7; From b4b01b4995fb15b55a2d067eb405917f5ab32709 · fixed in 4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd

  • Linux Linux

    5.0

  • KernelLinux

    From 5.0.0 · fixed in 5.10.266; From 5.11.0 · fixed in 5.15.217; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.148; From 6.7.0 · fixed in 6.12.101; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.6

References 8

git.kernel.org