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Vulnerabilities

Vulnerability · CVE-2023-54139

In the Linux kernel, the following vulnerability has been resolved: tracing/user_events: Ensure write index cannot be negative The write index indicates which event the data is for

Published Dec 24, 2025 · catalog updated Aug 5, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-54139. EPSS is 0.15%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.15%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 7f5a08c79df35e68f1a43033450c5050f12bc155 <fa7f2f5d1739452280c22727c4384a52b72ab5de

In the Linux kernel, the following vulnerability has been resolved: tracing/user_events: Ensure write index cannot be negative The write index indicates which event the data is for and accesses a per-file array. The index is passed by user processes during write() calls as the first 4 bytes. Ensure that it cannot be negative by returning -EINVAL to prevent out of bounds accesses. Update ftrace self-test to ensure this occurs properly.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux 7f5a08c79df35e68f1a43033450c5050f12bc155 <fa7f2f5d1739452280c22727c4384a52b72ab5de7f5a08c79df35e68f1a43033450c5050f12bc155 <fa7f2f5d1739452280c22727c4384a52b72ab5de

How to fix CVE-2023-54139

  • Upgrade

    CVE-2023-54139 lists a fix boundary at fa7f2f5d1739452280c22727c4384a52b72ab5de. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 7f5a08c79df35e68f1a43033450c5050f12bc155 <fa7f2f5d1739452280c22727c4384a52b72ab5de

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-54139. EPSS is 0.15%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux 7f5a08c79df35e68f1a43033450c5050f12bc155 <fa7f2f5d1739452280c22727c4384a52b72ab5de 7f5a08c79df35e68f1a43033450c5050f12bc155 <fa7f2f5d1739452280c22727c4384a52b72ab5de. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.15%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 24, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: tracing/user_events: Ensure write index cannot be negative The write index indicates which event the data is for and accesses a per-file array. The index is passed by user processes during write() calls as the first 4 bytes. Ensure that it cannot be negative by returning -EINVAL to prevent out of bounds accesses. Update ftrace sel

  2. Aug 5, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: tracing/user_events: Ensure write index cannot be negative The write index indicates which event the data is for and accesses a per-file array. The index is passed by user processes during write() calls as the first 4 bytes. Ensure that it cannot be negative by returning -EINVAL to prevent out of bounds accesses. Update ftrace sel

Sources

  • CVE.orgVulnerability recordCVE-2023-54139

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-54139

    30-day exploitation probability 0.15%

    first.org
  • EUVDVulnerability recordEUVD-2023-60306

    In the Linux kernel, the following vulnerability has been resolved: tracing/user_events: Ensure write index cannot be negative The write index indicates which event the data is for and accesses a per-file array. The index is passed by user processes during write() calls as the fi

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 29, 2026
  • EUVDOct 29, 2026