CVE-2023-53760

Local system hang via interrupt-unsafe UFS lock

Published Dec 8, 2025 · Updated May 11, 2026

Deadlock in the Linux kernel UFS MCQ subsystem in 6.3 through 6.3.2 allows local users to hang the system through UFS error handling. The ufshcd_mcq_poll_cqe_lock() function takes hwq->cq_lock with interrupts enabled, allowing a CQ interrupt entered during ufshcd_err_handler() to wait on the lock already held by the interrupted context. The path requires low-privileged local access and an active UFS MCQ controller; the bounded consequence is loss of system availability.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Deadlock in the Linux kernel UFS MCQ subsystem in 6.3 through 6.3.2 allows local users to hang the system through UFS error handling. The ufshcd_mcq_poll_cqe_lock() function takes hwq->cq_lock with interrupts enabled, allowing a CQ interrupt entered during ufshcd_err_handler() to wait on the lock already held by the interrupted context. The path requires low-privileged local access and an active UFS MCQ controller; the bounded consequence is loss of system availability.

The record

CVE
CVE-2023-53760
Published
Dec 8, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-833, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 8, 2025CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.3
  2. Affected versionversion=ed975065c31c2a0372e13c19e8140b69814a98ba <2ce8c49c7b53e0a2258b833eeab16a6d78f732d1
  3. Affected versionversion=ed975065c31c2a0372e13c19e8140b69814a98ba <948afc69615167a3c82430f99bfd046332b89912

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=ed975065c31c2a0372e13c19e8140b69814a98ba <2ce8c49c7b53e0a2258b833eeab16a6d78f732d1; version=ed975065c31c2a0372e13c19e8140b69814a98ba <948afc69615167a3c82430f99bfd046332b89912

Published CVSS scores

5.5Red HatCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-833Deadlock
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo