CVE-2023-54218

Inconsistent socket timestamps via unsynchronized sk_stamp read

Published Dec 30, 2025 · Updated Dec 30, 2025

A data race in Linux kernel socket timestamp handling allows local users to receive an inconsistent value through packet_recvmsg. sock_recv_cmsgs reads sk->sk_stamp directly while another execution context can write it, permitting load tearing instead of an atomic READ_ONCE access. Triggering requires concurrent packet-socket receive paths and socket timestamp access; the published record reports inconsistent timestamp data, not privilege escalation or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A data race in Linux kernel socket timestamp handling allows local users to receive an inconsistent value through packet_recvmsg. sock_recv_cmsgs reads sk->sk_stamp directly while another execution context can write it, permitting load tearing instead of an atomic READ_ONCE access. Triggering requires concurrent packet-socket receive paths and socket timestamp access; the published record reports inconsistent timestamp data, not privilege escalation or code execution.

The record

CVE
CVE-2023-54218
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

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=4.12
  2. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <564c3150ad357d571a0de7d8b644aa1f7e6e21b7
  3. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <7145f2309d649ad6273b9f66448321b9b4c523c8
  4. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <8319220054e5ea5f506d8d4c4b5e234f668ffc3b
  5. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <d06f67b2b8dcd00d995c468428b6bccebc5762d8
  6. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <d7343f8de019ebb55b2b6ef79b971f6ceb361a99
  7. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <de260d1e02cde39d317066835ee6e5234fc9f5a8
  8. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <dfd9248c071a3710c24365897459538551cb7167
  9. Affected versionversion=6c7c98bad4883a4a8710c96b2b44de482865eb6e <fd28692fa182d25e8d26bc1db506648839fde245

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <564c3150ad357d571a0de7d8b644aa1f7e6e21b7; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <7145f2309d649ad6273b9f66448321b9b4c523c8; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <8319220054e5ea5f506d8d4c4b5e234f668ffc3b; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <d06f67b2b8dcd00d995c468428b6bccebc5762d8; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <d7343f8de019ebb55b2b6ef79b971f6ceb361a99; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <de260d1e02cde39d317066835ee6e5234fc9f5a8; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <dfd9248c071a3710c24365897459538551cb7167; version=6c7c98bad4883a4a8710c96b2b44de482865eb6e <fd28692fa182d25e8d26bc1db506648839fde245

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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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