drm/virtio: bound EDID block reads to the response buffer
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.
CVE-2026-68255
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68255
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "65ce911f341ad8ff0c08922eff5bb6db75666eb0",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "64bedd2758eccbc74d39f7006a7ec16fa39dc901",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "3f506a85a905b080cadc029a1651a310479090a6",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "9fc2a017c5d597937e0c28b9a9669844aa796c42",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "2757e6e803092cf0aeaf4b735e16b5d3bdc705c5",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "35be0e2c6862abcd5e5f5445261f1fd910d4a9b4",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "375c1934ef0196d3b6d3a1eae3232bef8dae7bf7",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
"lessThan": "4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/virtio/virtgpu_vq.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.266",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/virtio/virtgpu_vq.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68255
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41163 · Revision 1
- Added to Heist Feed
- Publisher date