CVE-2023-54113

Kernel deadlock via interrupt-unsafe vmalloc lookup

Published Dec 24, 2025 · Updated Dec 24, 2025

Denial of service in affected Linux kernel branches starting at 5.12 allows attackers to trigger a kernel deadlock. The mm/util.c diagnostic path calls vmalloc_dump_obj for a non-slab rcu_head and takes vmap_area_lock even when call_rcu runs in interrupt context. Triggering requires a double call_rcu on such an object; the published record identifies rcutorture on Preempt-RT as a reproducer but no attacker-controlled path.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux kernel branches starting at 5.12 allows attackers to trigger a kernel deadlock. The mm/util.c diagnostic path calls vmalloc_dump_obj for a non-slab rcu_head and takes vmap_area_lock even when call_rcu runs in interrupt context. Triggering requires a double call_rcu on such an object; the published record identifies rcutorture on Preempt-RT as a reproducer but no attacker-controlled path.

The record

CVE
CVE-2023-54113
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record 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=5.12
  2. Affected versionversion=98f180837a896ecedf8f7e12af22b57f271d43c9 <0a22f9c17b1aa2a35b5eedee928f7841595b55cd
  3. Affected versionversion=98f180837a896ecedf8f7e12af22b57f271d43c9 <3f7a4e88e40e38c0b16a4bcb599b7b1d8c81440d
  4. Affected versionversion=98f180837a896ecedf8f7e12af22b57f271d43c9 <8fb1601ec0a2c4c34fc2170af767e5c2a6400573
  5. Affected versionversion=98f180837a896ecedf8f7e12af22b57f271d43c9 <c83ad36a18c02c0f51280b50272327807916987f
  6. Affected versionversion=98f180837a896ecedf8f7e12af22b57f271d43c9 <dddca4c46ec92f83449bc91dd199f46a89e066be

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=98f180837a896ecedf8f7e12af22b57f271d43c9 <0a22f9c17b1aa2a35b5eedee928f7841595b55cd; version=98f180837a896ecedf8f7e12af22b57f271d43c9 <3f7a4e88e40e38c0b16a4bcb599b7b1d8c81440d; version=98f180837a896ecedf8f7e12af22b57f271d43c9 <8fb1601ec0a2c4c34fc2170af767e5c2a6400573; version=98f180837a896ecedf8f7e12af22b57f271d43c9 <c83ad36a18c02c0f51280b50272327807916987f; version=98f180837a896ecedf8f7e12af22b57f271d43c9 <dddca4c46ec92f83449bc91dd199f46a89e066be

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
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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