{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-47369",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47369",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-21T15:03:35.149Z",
    "updatedAt": "2026-05-23T15:19:50.591Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "s390/qeth: fix NULL deref in qeth_clear_working_pool_list()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/qeth: fix NULL deref in qeth_clear_working_pool_list()\n\nWhen qeth_set_online() calls qeth_clear_working_pool_list() to roll\nback after an error exit from qeth_hardsetup_card(), we are at risk of\naccessing card->qdio.in_q before it was allocated by\nqeth_alloc_qdio_queues() via qeth_mpc_initialize().\n\nqeth_clear_working_pool_list() then dereferences NULL, and by writing to\nqueue->bufs[i].pool_entry scribbles all over the CPU's lowcore.\nResulting in a crash when those lowcore areas are used next (eg. on\nthe next machine-check interrupt).\n\nSuch a scenario would typically happen when the device is first set\nonline and its queues aren't allocated yet. An early IO error or certain\nmisconfigs (eg. mismatched transport mode, bad portno) then cause us to\nerror out from qeth_hardsetup_card() with card->qdio.in_q still being\nNULL.\n\nFix it by checking the pointer for NULL before accessing it.\n\nNote that we also have (rare) paths inside qeth_mpc_initialize() where\na configuration change can cause us to free the existing queues,\nexpecting that subsequent code will allocate them again. If we then\nerror out before that re-allocation happens, the same bug occurs.\n\nRoot-caused-by: Heiko Carstens <hca@linux.ibm.com>",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "eff73e16ee116f6eafa2be48fab42659a27cb453",
              "status": "affected",
              "versionType": "git",
              "lessThan": "db94f89e1dadf693c15c2d60de0c34777cea5779"
            },
            {
              "version": "eff73e16ee116f6eafa2be48fab42659a27cb453",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9b00fb12cdc9d8d1c3ffe82a78e74738127803fc"
            },
            {
              "version": "eff73e16ee116f6eafa2be48fab42659a27cb453",
              "status": "affected",
              "versionType": "git",
              "lessThan": "248f064af222a1f97ee02c84a98013dfbccad386"
            },
            {
              "version": "b2400fe7e1011c5f3dc2268e8382082465b1c8a2",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "22697ca855c06a4a1264d5651542b7d98870a8c4",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.7.16",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "version": "5.8.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.9"
            },
            {
              "version": "5.10.70",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.14.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.14.*"
            },
            {
              "version": "5.15",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}