CVE-2023-53067

Local service interruption via atomic-context mutex lock

Published May 2, 2025 · Updated May 11, 2026

Improper execution context in Linux kernel 5.19 through 6.1.20 and 6.2 through 6.2.7 allows local users to interrupt LoongArch systems. constant_clockevent_init() calls get_timer_irq() again during secondary-CPU startup, reaching irq_find_matching_fwspec() and taking a mutex while preemption is disabled. The path requires LoongArch with CONFIG_DEBUG_ATOMIC_SLEEP and CONFIG_DEBUG_PREEMPT enabled; the published assessment reports availability loss, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.19%
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

Improper execution context in Linux kernel 5.19 through 6.1.20 and 6.2 through 6.2.7 allows local users to interrupt LoongArch systems. constant_clockevent_init() calls get_timer_irq() again during secondary-CPU startup, reaching irq_find_matching_fwspec() and taking a mutex while preemption is disabled. The path requires LoongArch with CONFIG_DEBUG_ATOMIC_SLEEP and CONFIG_DEBUG_PREEMPT enabled; the published assessment reports availability loss, not data access or modification.

The record

CVE
CVE-2023-53067
Published
May 2, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 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=5.19
  2. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <acadbd058fa12b510fbecca11eae22bd6f654250
  3. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <b9c379e1d7e141b102f41858c9b8f6f36e7c89a4
  4. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <bb7a78e343468873bf00b2b181fcfd3c02d8cb56

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <acadbd058fa12b510fbecca11eae22bd6f654250; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <b9c379e1d7e141b102f41858c9b8f6f36e7c89a4; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <bb7a78e343468873bf00b2b181fcfd3c02d8cb56

Published CVSS scores

5.5NISTCVSS: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 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

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