CVE-2023-54134

Kernel memory consumption via unreleased autofs waitqueues

Published Dec 24, 2025 · Updated Dec 24, 2025

Memory leak in Linux autofs 2.6.27 and later allows attackers to consume kernel memory via interrupted expiration waits. autofs_catatonic_mode decrements a waitqueue's wait_ctr to zero after an interrupted autofs_wait but fails to free that queue, losing its 96-byte allocation. The published record does not establish an attacker privilege level; the demonstrated consequence is loss of one 96-byte kernel allocation per affected queue.

CVSS severityUnavailable
Unscored
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux autofs 2.6.27 and later allows attackers to consume kernel memory via interrupted expiration waits. autofs_catatonic_mode decrements a waitqueue's wait_ctr to zero after an interrupted autofs_wait but fails to free that queue, losing its 96-byte allocation. The published record does not establish an attacker privilege level; the demonstrated consequence is loss of one 96-byte kernel allocation per affected queue.

The record

CVE
CVE-2023-54134
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1985e8eae8627f02e3364690c5fed7af1c46be55
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6079dc77c6f32936e8a6766ee8334ae3c99f4504
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <696b625f3f85d80fca48c24d2948fbc451e74366
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <69ddafc7a7afd8401bab53eff5af813fa0d368a2
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <71eeddcad7342292c19042c290c477697acaccab
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726deae613bc1b6096ad3b61cc1e63e33330fbc2
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <976abbdc120a97049b9133e60fa7b29627d11de4
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccbe77f7e45dfb4420f7f531b650c00c6e9c7507

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1985e8eae8627f02e3364690c5fed7af1c46be55; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6079dc77c6f32936e8a6766ee8334ae3c99f4504; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <696b625f3f85d80fca48c24d2948fbc451e74366; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <69ddafc7a7afd8401bab53eff5af813fa0d368a2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <71eeddcad7342292c19042c290c477697acaccab; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726deae613bc1b6096ad3b61cc1e63e33330fbc2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <976abbdc120a97049b9133e60fa7b29627d11de4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccbe77f7e45dfb4420f7f531b650c00c6e9c7507

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.

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)
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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