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CVE-2026-92520

Estado: RecibidaSin puntuar—

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.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-92520",
  "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": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
              "lessThan": "1534c4bff3aaca19c4c9a82f93e9b81f7c983de3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
              "lessThan": "e2396b8a562073787e627a5f483f1bc5c452fa6a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
              "lessThan": "7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "40e34ea01748e5b8afdd40a172868be1e1ab0ede",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "388c9d3eefaea99828ee5000c693128a5b41ee7c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "acabf5df49aa3a4f9c96200102d893351b511a88",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e388671635acf470f0986d874389148fd234620b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "232f0ba4d69263af5912e279fcc32fef2882b1dc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.4.258",
              "lessThan": "5.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.10.198",
              "lessThan": "5.11",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.15.134",
              "lessThan": "5.16",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.56",
              "lessThan": "6.2",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.5.6",
              "lessThan": "6.6",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "kernel/bpf/queue_stack_maps.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.6",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/bpf/queue_stack_maps.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:54.900",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1534c4bff3aaca19c4c9a82f93e9b81f7c983de3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e2396b8a562073787e627a5f483f1bc5c452fa6a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "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."
    }
  ],
  "lastModified": "2026-09-17T17:17:54.900",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}