CVE-2026-46311

Kernel-state corruption via stale wptr mapping

Published Jun 8, 2026 · Updated Jun 8, 2026

Race condition in AMDGPU user queues in Linux Kernel 6.16 through 7.0.8 allows local users to corrupt kernel driver state. The queue-creation path reads write-pointer mapping data without locking both the VM root buffer object and mapped buffer object, allowing a concurrent unmap and same-address replacement to leave a stale object reference. Exploitation requires local low-privileged access and concurrent queue creation and unmapping; kernel.org does not specify a resulting code-execution primitive.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in AMDGPU user queues in Linux Kernel 6.16 through 7.0.8 allows local users to corrupt kernel driver state. The queue-creation path reads write-pointer mapping data without locking both the VM root buffer object and mapped buffer object, allowing a concurrent unmap and same-address replacement to leave a stale object reference. Exploitation requires local low-privileged access and concurrent queue creation and unmapping; kernel.org does not specify a resulting code-execution primitive.

The record

CVE
CVE-2026-46311
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 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 <7.0.9
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <336a9186f3a4b65bbd865d93936605ac8a1a3991
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6da7b1242da4455b11c24ce667d1cab1a348c8ea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <7.0.9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <336a9186f3a4b65bbd865d93936605ac8a1a3991; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6da7b1242da4455b11c24ce667d1cab1a348c8ea

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0Amazon LinuxCVSS: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

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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