CVE-2026-64219

Local kernel code execution via unchecked AUX bounds

Published Jul 24, 2026 · Updated Jul 24, 2026

Memory corruption in the Linux Kernel AMD display driver allows local users to execute kernel code through malformed AUX state. dc_process_dmub_aux_transfer_async copies an unchecked payload length into a 16-byte stack buffer and indexes dc->links without validating link_index. Exploitation requires local DRM/AUX device access and abnormal internal state because current callers cap transfers at 16 bytes.

CVSS severity7.0
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux Kernel AMD display driver allows local users to execute kernel code through malformed AUX state. dc_process_dmub_aux_transfer_async copies an unchecked payload length into a 16-byte stack buffer and indexes dc->links without validating link_index. Exploitation requires local DRM/AUX device access and abnormal internal state because current callers cap transfers at 16 bytes.

The record

CVE
CVE-2026-64219
Published
Jul 24, 2026
Updated
Jul 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-120, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.15.209
  2. Affected versionversion=0 <6.1.175
  3. Affected versionversion=0 <6.12.92
  4. Affected versionversion=0 <6.18.34
  5. Affected versionversion=0 <6.6.142
  6. Affected versionversion=0 <7.0.11
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <16a5fa57565afb6bf37e18129921c270c93d8e2b
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1c8c6e912f2945b2a3e669afca6b52174b88e86e
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1ecde19bfce6535bffddad1139ff466b6d401b8e
  10. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3265f3ed373fb8048be713aadcdf702579a0e53d
  11. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6c92f6d9600efa3ef0d9e560a2b52776d9803c29
  12. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <90c398e822ca76e40548df0c061dd4f93ea92d71
  13. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6590e3f766e3111dd1beaf88b9384d117acfa6b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <5.15.209; version=0 <6.1.175; version=0 <6.12.92; version=0 <6.18.34; version=0 <6.6.142; version=0 <7.0.11; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <16a5fa57565afb6bf37e18129921c270c93d8e2b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1c8c6e912f2945b2a3e669afca6b52174b88e86e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1ecde19bfce6535bffddad1139ff466b6d401b8e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3265f3ed373fb8048be713aadcdf702579a0e53d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6c92f6d9600efa3ef0d9e560a2b52776d9803c29; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <90c398e822ca76e40548df0c061dd4f93ea92d71; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6590e3f766e3111dd1beaf88b9384d117acfa6b

Published CVSS scores

7.0LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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