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bpf: Zero queue and stack outputs on lock failure

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-92520

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-92520

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
        "lessThan": "a6090eeb289c5fa45f7b629befac2bd3c19a6dae",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
        "lessThan": "23b4bcc79bab5285275912b94e98c286f281de75",
        "versionType": "git"
      },
      {
        "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": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.114",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "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",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "kernel/bpf/queue_stack_maps.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-92520

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#48703 · Revision 1
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Publisher date
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