CVE-2026-53293

Local system hang via AMDGPU ioctl deadlock

Published Jun 26, 2026 · Updated Jun 26, 2026

Improper locking in the Linux Kernel AMDGPU driver allows local users to hang affected systems through AMDGPU_INFO_READ_MMR_REG. The ioctl path calls copy_to_user while holding mm_lock, allocates memory under the reset semaphore, and uses down_read_trylock instead of waiting for reset completion. Exploitation requires local access to an AMDGPU device and interrupts service by deadlocking kernel work without exposing or changing data.

CVSS severity5.5
Medium
EPSS probability0.10%
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 the Linux Kernel AMDGPU driver allows local users to hang affected systems through AMDGPU_INFO_READ_MMR_REG. The ioctl path calls copy_to_user while holding mm_lock, allocates memory under the reset semaphore, and uses down_read_trylock instead of waiting for reset completion. Exploitation requires local access to an AMDGPU device and interrupts service by deadlocking kernel work without exposing or changing data.

The record

CVE
CVE-2026-53293
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-833, CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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=17a98c942cb106ec08564e8f43b5470a4dd5d3f6
  2. Affected versionversion=6.10.14 <6.11
  3. Affected versionversion=6.11.3 <6.12
  4. Affected versionversion=6.12
  5. Affected versionversion=6.6.55 <6.6.141
  6. Affected versionversion=8361e3f7882876d98ba98cae0d3149450dd80912 <8c4254c8f5836e77ae83e7fc037f02b69f7a0977
  7. Affected versionversion=9a98563345697bdb1d3410ff428473b2e781f4db
  8. Affected versionversion=9e823f307074c0f82b5f6044943b0086e3079bed <0ef196a208385b7d7da79f411c161b04e97283e2
  9. Affected versionversion=9e823f307074c0f82b5f6044943b0086e3079bed <5c29d20470d4566d1b68df57097d642d01f8b427
  10. Affected versionversion=9e823f307074c0f82b5f6044943b0086e3079bed <61957c2e467b39b528a290016367d32a433fa846
  11. Affected versionversion=9e823f307074c0f82b5f6044943b0086e3079bed <a31c3feb54b15a90232e497ad0e27e8a82052d8d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=17a98c942cb106ec08564e8f43b5470a4dd5d3f6; version=6.10.14 <6.11; version=6.11.3 <6.12; version=6.12; version=6.6.55 <6.6.141; version=8361e3f7882876d98ba98cae0d3149450dd80912 <8c4254c8f5836e77ae83e7fc037f02b69f7a0977; version=9a98563345697bdb1d3410ff428473b2e781f4db; version=9e823f307074c0f82b5f6044943b0086e3079bed <0ef196a208385b7d7da79f411c161b04e97283e2; version=9e823f307074c0f82b5f6044943b0086e3079bed <5c29d20470d4566d1b68df57097d642d01f8b427; version=9e823f307074c0f82b5f6044943b0086e3079bed <61957c2e467b39b528a290016367d32a433fa846; version=9e823f307074c0f82b5f6044943b0086e3079bed <a31c3feb54b15a90232e497ad0e27e8a82052d8d

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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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-833Deadlock
CWE-667Improper Locking
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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