CVE-2023-52785

Local system crash via UFS command race

Published May 21, 2024 · Updated May 11, 2026

Race condition in the Linux kernel 6.5 through 6.5.12, 6.6 through 6.6.2, and 6.7-rc1 allows local users to crash the system. The ufshcd_mcq_abort() path clears lrbp->cmd without holding the hardware queue's cq_lock while the completion interrupt handler can still dereference it. Reachability requires low-privileged local access, UFS operating in MCQ mode, and a command timeout concurrent with completion, resulting in a kernel NULL-pointer crash.

CVSS severity4.7
Medium
EPSS probability0.18%
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 the Linux kernel 6.5 through 6.5.12, 6.6 through 6.6.2, and 6.7-rc1 allows local users to crash the system. The ufshcd_mcq_abort() path clears lrbp->cmd without holding the hardware queue's cq_lock while the completion interrupt handler can still dereference it. Reachability requires low-privileged local access, UFS operating in MCQ mode, and a command timeout concurrent with completion, resulting in a kernel NULL-pointer crash.

The record

CVE
CVE-2023-52785
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 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=6.5
  2. Affected versionversion=f1304d4420777f82a1d844c606db3d9eca841765 <27900d7119c464b43cd9eac69c85884d17bae240
  3. Affected versionversion=f1304d4420777f82a1d844c606db3d9eca841765 <8f15a7e3c054d960bbd1521110700450bbf798a1
  4. Affected versionversion=f1304d4420777f82a1d844c606db3d9eca841765 <f84d461f33a6b27304d468d9cfb56c0cefdb4ee7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=f1304d4420777f82a1d844c606db3d9eca841765 <27900d7119c464b43cd9eac69c85884d17bae240; version=f1304d4420777f82a1d844c606db3d9eca841765 <8f15a7e3c054d960bbd1521110700450bbf798a1; version=f1304d4420777f82a1d844c606db3d9eca841765 <f84d461f33a6b27304d468d9cfb56c0cefdb4ee7

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499.004Application 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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