UnratedFix available

bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log It's trivial for user to trigger "verifier log line truncated" warning, as verifier has a fixed-sized buffer of 1024 bytes (as of now), and there are at least two pieces of user-provided information that can be output through this buffer, and both can be arbitrarily sized by user: - BTF names; - BTF.ext source code lines strings. Verifier log buffer should be properly sized for typical verifier state output. But it's sort-of expected that this buffer won't be long enough in some circumstances. So let's drop the check. In any case code will work correctly, at worst truncating a part of a single line output.

Products: Kernel
Affected versions: Not specified
Fixed versions: 6.1.107, 6.4.7
CVEs: CVE-2023-54145
Confirmed fixed CVEs: Not specified
Updated in this feed: 3 Nov 2026, 23:26 UTC · Revision 1

Source evidence

bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log

core-osv · Original source

Published 24 Dec 2025, 13:06 UTC

osv:CVE-2023-54145

Kernel

Fixed versions: 6.1.107, 6.4.7

Complete source record

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  "url": "https://osv.dev/vulnerability/CVE-2023-54145",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log It's trivial for user to trigger \"verifier log line truncated\" warning, as verifier has a fixed-sized buffer of 1024 bytes (as of now), and there are at least two pieces of user-provided information that can be output through this buffer, and both can be arbitrarily sized by user: - BTF names; - BTF.ext source code lines strings. Verifier log buffer should be properly sized for typical verifier state output. But it's sort-of expected that this buffer won't be long enough in some circumstances. So let's drop the check. In any case code will work correctly, at worst truncating a part of a single line output.",
    "evidence": "osv:CVE-2023-54145",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.1.107",
            "evidence": "/affected/1/ranges"
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            "value": "6.4.7",
            "evidence": "/affected/1/ranges"
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    "severity": "unknown",
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      "aliases": [
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          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "4.15.0"
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                  "fixed": "6.4.7"
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            "ecosystem": "Linux"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54145.json"
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      ],
      "modified": "2026-10-28T02:30:32.157092998Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/40c88c429a598006f91ad7a2b89856cd50b3a008",
        "https://git.kernel.org/stable/c/926a175026fed5d534f587ea4ec3ec49265cd3c5",
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        "https://nvd.nist.gov/vuln/detail/CVE-2023-54145",
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      "provider_metadata": {
        "cna_assigner": "Linux",
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 499250,
  "published_at": "2025-12-24T13:06:58.227+00:00"
}