CVE-2026-80606

Kernel warning via notifier lock mode mismatch

Published Aug 28, 2026 · Updated Aug 28, 2026

Improper locking in Linux 6.18 allows local users to trigger a kernel warning through an Xe user-pointer VM bind operation. xe_pt_svm_userptr_pre_commit() holds notifier_lock for reading, while forced invalidation marks the context as already holding it for writing before drm_gpusvm_unmap_pages() checks the lock mode. The path exists only when CONFIG_DRM_XE_USERPTR_INVAL_INJECT is enabled; production builds with the option disabled retain the unaffected read-lock path.

CVSS severityUnavailable
Unscored
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

Improper locking in Linux 6.18 allows local users to trigger a kernel warning through an Xe user-pointer VM bind operation. xe_pt_svm_userptr_pre_commit() holds notifier_lock for reading, while forced invalidation marks the context as already holding it for writing before drm_gpusvm_unmap_pages() checks the lock mode. The path exists only when CONFIG_DRM_XE_USERPTR_INVAL_INJECT is enabled; production builds with the option disabled retain the unaffected read-lock path.

The record

CVE
CVE-2026-80606
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=6.18
  2. Affected versionversion=9e978741488261e117bb50e5dfcf8e4080990958 <ab9ea5c943c7e780124e75b7ffad9f1c752b2579
  3. Affected versionversion=9e978741488261e117bb50e5dfcf8e4080990958 <dca6e08c923a44d2d66b955e03dd57a3a38c2b94
  4. Affected versionversion=9e978741488261e117bb50e5dfcf8e4080990958 <f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.18; version=9e978741488261e117bb50e5dfcf8e4080990958 <ab9ea5c943c7e780124e75b7ffad9f1c752b2579; version=9e978741488261e117bb50e5dfcf8e4080990958 <dca6e08c923a44d2d66b955e03dd57a3a38c2b94; version=9e978741488261e117bb50e5dfcf8e4080990958 <f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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