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NVD / CVE Program· CNA Linux

CVE-2026-68255: drm/virtio: bound EDID block reads to the response buffer

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5, 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4, 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5, 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4, 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.7 · v3.1—No exploit Fix available
Published
Aug 10, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 8th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.7
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-68255

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.0affected
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 65ce911f341ad8ff0c08922eff5bb6db75666eb0affected · git
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 64bedd2758eccbc74d39f7006a7ec16fa39dc901affected · git
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 3f506a85a905b080cadc029a1651a310479090a6affected · git
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 9fc2a017c5d597937e0c28b9a9669844aa796c42affected · git
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5affected · git
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4affected · git
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7affected · git
    • b4b01b4995fb15b55a2d067eb405917f5ab32709 and later · before 4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccdaffected · git
    • before 5.0not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-68247Aug 10, 2026 · drm/i915/bios: range check LFP Data Block panel_type2
    0Monitor
  • ← EarlierCVE-2026-68253Aug 10, 2026 · drm/i915/hdcp: check streams[] bounds before overflow
    31Monitor
  • Later →CVE-2026-68257Aug 10, 2026 · drm/amdkfd: fix 32-bit overflow in CWSR total size calculation
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux2757e6e803092cf0aeaf4b735e16b5d3bdc705c5Vendor (CNA)
Linux Linux35be0e2c6862abcd5e5f5445261f1fd910d4a9b4Vendor (CNA)
Linux Linux375c1934ef0196d3b6d3a1eae3232bef8dae7bf7Vendor (CNA)
Linux Linux3f506a85a905b080cadc029a1651a310479090a6Vendor (CNA)
Linux Linux4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccdVendor (CNA)
Linux Linux64bedd2758eccbc74d39f7006a7ec16fa39dc901Vendor (CNA)
Linux Linux65ce911f341ad8ff0c08922eff5bb6db75666eb0Vendor (CNA)
Linux Linux9fc2a017c5d597937e0c28b9a9669844aa796c42Vendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-681600 days apartceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
    39Monitor
  • CVE-2026-683880 days apartsmb/client: handle overlapping allocated ranges in fallocate
    39Monitor
  • CVE-2026-680822 days apartlibceph: fix two unsafe bare decodes in decode_lockers()
    39Monitor
  • CVE-2026-720845 days apartscsi: target: Bound PR-OUT TransportID parsing to the received buffer
    39Monitor
  • CVE-2026-6391222 days apartxfrm: esp: restore combined single-frag length gate
    39Monitor
  • CVE-2026-683430 days apartsmb: client: validate DFS referral PathConsumed
    36Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records