CVE-2026-92520 (GCVE-0-2026-92520)
Vulnerability from cvelistv5
Published
2026-09-17 16:10
Modified
2026-10-30 12:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Zero queue and stack outputs on lock failure Queue and stack pop/peek helpers accept an uninitialized output buffer because the verifier expects the helper to initialize it. The empty-map error path clears the buffer, but a failed lock acquisition returns -EBUSY without writing it. Clear the output before returning -EBUSY so BPF programs cannot observe uninitialized stack contents after a failed helper call.
References
Impacted products
Vendor Product Version
Linux Linux Version: e388671635acf470f0986d874389148fd234620b
Version: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8
Version: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8
Version: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8
Version: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8
Version: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8
Version: 40e34ea01748e5b8afdd40a172868be1e1ab0ede
Version: 388c9d3eefaea99828ee5000c693128a5b41ee7c
Version: acabf5df49aa3a4f9c96200102d893351b511a88
Version: 232f0ba4d69263af5912e279fcc32fef2882b1dc
Version: 6.1.56   ≤
Version: 5.4.258   ≤
Version: 5.10.198   ≤
Version: 5.15.134   ≤
Version: 6.5.6   ≤
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Zero queue and stack outputs on lock failure\n\nQueue and stack pop/peek helpers accept an uninitialized output buffer\nbecause the verifier expects the helper to initialize it. The empty-map\nerror path clears the buffer, but a failed lock acquisition returns\n-EBUSY without writing it.\n\nClear the output before returning -EBUSY so BPF programs cannot observe\nuninitialized stack contents after a failed helper call."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:35:45.323Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/6468e8ac026b44ae2a78114b80f9d1b9164d0f6c"
        },
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          "url": "https://git.kernel.org/stable/c/a6090eeb289c5fa45f7b629befac2bd3c19a6dae"
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        {
          "url": "https://git.kernel.org/stable/c/7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232"
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      "title": "bpf: Zero queue and stack outputs on lock failure",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-92520",
    "datePublished": "2026-09-17T16:10:27.447Z",
    "dateReserved": "2026-09-16T12:21:13.874Z",
    "dateUpdated": "2026-10-30T12:35:45.323Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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