CVE-2026-68255: drm/virtio: bound EDID block reads to the response buffer
Vulnerability summary
CVE-2026-68255 is a high (CVSS 7.7) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.5% of scored vulnerabilities.
Not severe (CVSS 7.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 24 · Related 22Timeline
- 10-08-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.7HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.7HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- NVDNIST7.7HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.19%
Chance of exploitation in the next 30 days
Percentile
9%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.19% on 06-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu165 products
- linuxAll versions (No fix recorded) | < 5.15.0-202.212 | < 6.8.0-147.147 | < 7.0.0-38.38
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1119.126 | < 6.8.0-1067.70 | < 7.0.0-1014.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.187-1 | < 6.12.101-1 | < 7.1.6-1
- linux-6.12< 6.12.101-1~deb12u1
Linux1 product
- linux≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 65ce911f341ad8ff0c08922eff5bb6db75666eb0 | ≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 64bedd2758eccbc74d39f7006a7ec16fa39dc901 | ≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 3f506a85a905b080cadc029a1651a310479090a6 | ≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 9fc2a017c5d597937e0c28b9a9669844aa796c42 | ≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5 | ≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4 | ≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7 | ≥ b4b01b4995fb15b55a2d067eb405917f5ab32709, < 4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd | 5.0
3 vendors · 168 products
