CVE-2023-54145

Kernel warning via oversized BPF verifier metadata

Published Dec 24, 2025 · Updated Dec 24, 2025

Improper input handling in the Linux kernel allows local users to trigger a kernel warning through crafted BPF type metadata. kernel/bpf/log.c invokes WARN_ONCE when its fixed 1,024-byte verifier-line buffer truncates an arbitrarily long BTF name or BTF.ext source line. Reachability requires submitting such metadata to the BPF verifier; execution otherwise continues correctly, with only part of one log line truncated.

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

Improper input handling in the Linux kernel allows local users to trigger a kernel warning through crafted BPF type metadata. kernel/bpf/log.c invokes WARN_ONCE when its fixed 1,024-byte verifier-line buffer truncates an arbitrarily long BTF name or BTF.ext source line. Reachability requires submitting such metadata to the BPF verifier; execution otherwise continues correctly, with only part of one log line truncated.

The record

CVE
CVE-2023-54145
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
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 <40c88c429a598006f91ad7a2b89856cd50b3a008
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <926a175026fed5d534f587ea4ec3ec49265cd3c5
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cff36398bd4c7d322d424433db437f3c3391c491

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <40c88c429a598006f91ad7a2b89856cd50b3a008; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <926a175026fed5d534f587ea4ec3ec49265cd3c5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cff36398bd4c7d322d424433db437f3c3391c491

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)
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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