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CVE-2023-54145

Status: DeferredUnscored—

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.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux KernelAI

References

Raw JSON (NVD)

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{
  "id": "CVE-2023-54145",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "a2a7d5701052542cd2260e7659b12443e0a74733",
              "lessThan": "40c88c429a598006f91ad7a2b89856cd50b3a008",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a2a7d5701052542cd2260e7659b12443e0a74733",
              "lessThan": "926a175026fed5d534f587ea4ec3ec49265cd3c5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a2a7d5701052542cd2260e7659b12443e0a74733",
              "lessThan": "cff36398bd4c7d322d424433db437f3c3391c491",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/bpf/log.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.107",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.4.7",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/bpf/log.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T13:16:16.510",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/40c88c429a598006f91ad7a2b89856cd50b3a008",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/926a175026fed5d534f587ea4ec3ec49265cd3c5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cff36398bd4c7d322d424433db437f3c3391c491",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log\n\nIt's trivial for user to trigger \"verifier log line truncated\" warning,\nas verifier has a fixed-sized buffer of 1024 bytes (as of now), and there are at\nleast two pieces of user-provided information that can be output through\nthis buffer, and both can be arbitrarily sized by user:\n  - BTF names;\n  - BTF.ext source code lines strings.\n\nVerifier log buffer should be properly sized for typical verifier state\noutput. But it's sort-of expected that this buffer won't be long enough\nin some circumstances. So let's drop the check. In any case code will\nwork correctly, at worst truncating a part of a single line output."
    }
  ],
  "lastModified": "2026-06-17T06:46:53.077",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}