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NVD / CVE Program· CNA Linux

CVE-2026-68446: drm/vmwgfx: Validate vmw_surface_metadata::array_size

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0403cec2aff8037bc246cf9a0831eb169ddcd9df, 5ff94e1279176b539d451e3e754fdcbd1a8d520a, 6910ccaf41678f7761ba2e57d72b77d056320b4d; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.

Low priority for now. Upgrade to Linux Linux 0403cec2aff8037bc246cf9a0831eb169ddcd9df, 5ff94e1279176b539d451e3e754fdcbd1a8d520a, 6910ccaf41678f7761ba2e57d72b77d056320b4d; 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/vmwgfx: Validate vmw_surface_metadata::array_size This field comes from userspace and should be validated against specific limits depending on which Shader Model (SM) is available.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 12, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 1th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
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-2026-68446

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

    • 5.7affected
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before e949adf2d42678fb391a41db277e2fcb12090566affected · git
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before 0403cec2aff8037bc246cf9a0831eb169ddcd9dfaffected · git
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before aded8463466ede7a7fbd1bbf821756c67c83e89baffected · git
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before 5ff94e1279176b539d451e3e754fdcbd1a8d520aaffected · git
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before 71779fe8bf403a9b3e28dc59229fa556db32d35daffected · git
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before b1379f0c42b88cb60b9f3757eb5d1e73ad460ed8affected · git
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before 6910ccaf41678f7761ba2e57d72b77d056320b4daffected · git
    • 504901dbb0b565fcbe466b0c56f3131586df5afd and later · before a4f55260f7f7d4dc4d0ee55063dfb0c457b77991affected · git
    • before 5.7not 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-2026-68442Aug 12, 2026 · btrfs: don't propagate EXTENT_FLAG_LOGGING to split extent maps
    31Monitor
  • ← EarlierCVE-2026-68445Aug 12, 2026 · drm/vc4: Prevent shader BO mappings from becoming writable
    31Monitor
  • Later →CVE-2026-68447Aug 12, 2026 · drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to BO size
    28Monitor

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 Linux0403cec2aff8037bc246cf9a0831eb169ddcd9dfVendor (CNA)
Linux Linux5ff94e1279176b539d451e3e754fdcbd1a8d520aVendor (CNA)
Linux Linux6910ccaf41678f7761ba2e57d72b77d056320b4dVendor (CNA)
Linux Linux71779fe8bf403a9b3e28dc59229fa556db32d35dVendor (CNA)
Linux Linuxa4f55260f7f7d4dc4d0ee55063dfb0c457b77991Vendor (CNA)
Linux Linuxaded8463466ede7a7fbd1bbf821756c67c83e89bVendor (CNA)
Linux Linuxb1379f0c42b88cb60b9f3757eb5d1e73ad460ed8Vendor (CNA)
Linux Linuxe949adf2d42678fb391a41db277e2fcb12090566Vendor (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-2026-681542 days apartlibceph: reject zero bucket types in crush_decode
    39Monitor
  • CVE-2026-684773 days apartipvs: fix more places with wrong ipv6 transport offsets
    39Monitor
  • CVE-2026-720653 days apartnet: mana: Validate the packet length reported by the NIC
    39Monitor
  • CVE-2026-9999964 days apartipv4: validate checksum_start before completing checksum
    37Monitor
  • CVE-2026-684541 days apartKVM: s390: pci: Fix handling of AIF enable without AISB
    35Monitor
  • CVE-2026-681992 days apartwifi: ath6kl: fix OOB access from firmware ADDBA window size
    35Monitor

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).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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

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