CVE-2023-54226

Unspecified impact via AF_UNIX shutdown data race

Published Dec 30, 2025 · Updated Dec 30, 2025

Data race in affected Linux kernel versions allows local users to cause unspecified impact through concurrent AF_UNIX shutdown and polling. unix_release_sock() and unix_shutdown() write sk_shutdown under unix_state_lock(), while unix_poll() and unix_dgram_poll() read that field without synchronization. Triggering requires concurrent shutdown or socket release and polling on the same AF_UNIX socket; no concrete security consequence is published.

CVSS severity7.0
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data race in affected Linux kernel versions allows local users to cause unspecified impact through concurrent AF_UNIX shutdown and polling. unix_release_sock() and unix_shutdown() write sk_shutdown under unix_state_lock(), while unix_poll() and unix_dgram_poll() read that field without synchronization. Triggering requires concurrent shutdown or socket release and polling on the same AF_UNIX socket; no concrete security consequence is published.

The record

CVE
CVE-2023-54226
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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 <196528ad484443627779540697f4fb0ef0e01c52
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1c488f4e95b498c977fbeae784983eb4cf6085e8
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8307e372e7445ec7d3cd2ff107ce5078eaa02815
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a41559ae3681975f1ced815d8d4c983b6b938499
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e1d09c2c2f5793474556b60f83900e088d0d366d
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e410895892f99700ce54347d42c8dbe962eea9f4
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f237f79b63c9242450e6869adcd2c10445859f28
  8. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <196528ad484443627779540697f4fb0ef0e01c52; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1c488f4e95b498c977fbeae784983eb4cf6085e8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8307e372e7445ec7d3cd2ff107ce5078eaa02815; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a41559ae3681975f1ced815d8d4c983b6b938499; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e1d09c2c2f5793474556b60f83900e088d0d366d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e410895892f99700ce54347d42c8dbe962eea9f4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f237f79b63c9242450e6869adcd2c10445859f28; version=2.6.12

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.7SUSECVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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)
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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