CVE-2023-53031

Kernel warnings via mutex in IRQ-disabled context

Published Mar 27, 2025 · Updated May 11, 2026

Availability flaw in Linux allows local users to trigger kernel warnings by scheduling a PowerPC thread_imc performance event. The thread_imc_event_add path takes a sleeping mutex while interrupts are disabled, causing mutex_lock to invoke __might_resched in an invalid atomic context. Local low-privilege perf access and PowerPC thread-IMC support are required; the published reproduction establishes repeated warnings rather than code execution or data access.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Availability flaw in Linux allows local users to trigger kernel warnings by scheduling a PowerPC thread_imc performance event. The thread_imc_event_add path takes a sleeping mutex while interrupts are disabled, causing mutex_lock to invoke __might_resched in an invalid atomic context. Local low-privilege perf access and PowerPC thread-IMC support are required; the published reproduction establishes repeated warnings rather than code execution or data access.

The record

CVE
CVE-2023-53031
Published
Mar 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 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=4.14
  2. Affected versionversion=8f95faaac56c18b32d0e23ace55417a440abdb7e <424bcb570cb320d1d15238cd4c933522b90f78fa
  3. Affected versionversion=8f95faaac56c18b32d0e23ace55417a440abdb7e <76d588dddc459fefa1da96e0a081a397c5c8e216
  4. Affected versionversion=8f95faaac56c18b32d0e23ace55417a440abdb7e <8cbeb60320ac45a8240b561c8ef466b86c34dedc
  5. Affected versionversion=8f95faaac56c18b32d0e23ace55417a440abdb7e <a90d339f1f66be4a946769b565668e2bd0686dfa
  6. Affected versionversion=8f95faaac56c18b32d0e23ace55417a440abdb7e <d0c6d2a31026102d4738b47a610bed4401b9834f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=8f95faaac56c18b32d0e23ace55417a440abdb7e <424bcb570cb320d1d15238cd4c933522b90f78fa; version=8f95faaac56c18b32d0e23ace55417a440abdb7e <76d588dddc459fefa1da96e0a081a397c5c8e216; version=8f95faaac56c18b32d0e23ace55417a440abdb7e <8cbeb60320ac45a8240b561c8ef466b86c34dedc; version=8f95faaac56c18b32d0e23ace55417a440abdb7e <a90d339f1f66be4a946769b565668e2bd0686dfa; version=8f95faaac56c18b32d0e23ace55417a440abdb7e <d0c6d2a31026102d4738b47a610bed4401b9834f

Published CVSS scores

5.5Canonical UbuntuCVSS: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

No sourced classifications are available.

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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