CVE-2023-52632

Local GPU hang via circular SRCU locking

Published Apr 2, 2024 · Updated May 11, 2026

Deadlock in the amdkfd SVM subsystem in Linux allows local users to hang GPU workloads through access to KFD memory-management paths. The svm_range_deferred_list_work path calls mmput synchronously while its work item is active, so MMU-notifier SRCU synchronization closes a circular dependency through work flushing. Reachability requires local access to the AMD KFD device path, and the documented consequence is an availability interruption.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in the amdkfd SVM subsystem in Linux allows local users to hang GPU workloads through access to KFD memory-management paths. The svm_range_deferred_list_work path calls mmput synchronously while its work item is active, so MMU-notifier SRCU synchronization closes a circular dependency through work flushing. Reachability requires local access to the AMD KFD device path, and the documented consequence is an availability interruption.

The record

CVE
CVE-2023-52632
Published
Apr 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=42de677f79999791bee4e21be318c32d90ab62c6 <1556c242e64cdffe58736aa650b0b395854fe4d4
  2. Affected versionversion=42de677f79999791bee4e21be318c32d90ab62c6 <2a9de42e8d3c82c6990d226198602be44f43f340
  3. Affected versionversion=42de677f79999791bee4e21be318c32d90ab62c6 <752312f6a79440086ac0f9b08d7776870037323c
  4. Affected versionversion=42de677f79999791bee4e21be318c32d90ab62c6 <b602f098f716723fa5c6c96a486e0afba83b7b94
  5. Affected versionversion=5.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=42de677f79999791bee4e21be318c32d90ab62c6 <1556c242e64cdffe58736aa650b0b395854fe4d4; version=42de677f79999791bee4e21be318c32d90ab62c6 <2a9de42e8d3c82c6990d226198602be44f43f340; version=42de677f79999791bee4e21be318c32d90ab62c6 <752312f6a79440086ac0f9b08d7776870037323c; version=42de677f79999791bee4e21be318c32d90ab62c6 <b602f098f716723fa5c6c96a486e0afba83b7b94; version=5.14

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.4OracleCVSS:3.1/AV:L/AC:L/PR:H/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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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