CVE-2026-92520 (GCVE-0-2026-92520)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-10-21 12:51
VLAI
Title
bpf: Zero queue and stack outputs on lock failure
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 , < a6090eeb289c5fa45f7b629befac2bd3c19a6dae (git)
Affected: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 , < 23b4bcc79bab5285275912b94e98c286f281de75 (git)
Affected: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 , < 1534c4bff3aaca19c4c9a82f93e9b81f7c983de3 (git)
Affected: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 , < e2396b8a562073787e627a5f483f1bc5c452fa6a (git)
Affected: a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 , < 7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232 (git)
Affected: 40e34ea01748e5b8afdd40a172868be1e1ab0ede (git)
Affected: 388c9d3eefaea99828ee5000c693128a5b41ee7c (git)
Affected: acabf5df49aa3a4f9c96200102d893351b511a88 (git)
Affected: e388671635acf470f0986d874389148fd234620b (git)
Affected: 232f0ba4d69263af5912e279fcc32fef2882b1dc (git)
Affected: 5.4.258 , < 5.5 (semver)
Affected: 5.10.198 , < 5.11 (semver)
Affected: 5.15.134 , < 5.16 (semver)
Affected: 6.1.56 , < 6.2 (semver)
Affected: 6.5.6 , < 6.6 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.114 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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          "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."
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-09-17T16:10:27.447Z",
    "dateReserved": "2026-09-16T12:21:13.874Z",
    "dateUpdated": "2026-10-21T12:51:46.872Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2026-92520",
      "id": "msrc_CVE-2026-92520",
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      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "bpf: Zero queue and stack outputs on lock failure",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-92520.json",
      "version": "2"
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        "metrics": {},
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      "cve": "CVE-2026-92520",
      "id": "CVE-2026-92520",
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      "product_status:known_affected": "186",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bpf: Zero queue and stack outputs on lock failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92520.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-10-20T00:30:52Z",
      "cve": "CVE-2026-92520",
      "id": "CVE-2026-92520",
      "initial_release_date": "2026-09-22T16:26:15Z",
      "product_status:known_affected": "113",
      "product_status:known_not_affected": "235",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-92520",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-92520.json",
      "version": "4"
    }
  }
}



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