{
  "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-2023-53698",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53698",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-10-22T13:23:38.384Z",
    "updatedAt": "2026-10-15T21:41:33.758Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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": "xsk: fix refcount underflow in error path",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: fix refcount underflow in error path\n\nFix a refcount underflow problem reported by syzbot that can happen\nwhen a system is running out of memory. If xp_alloc_tx_descs() fails,\nand it can only fail due to not having enough memory, then the error\npath is triggered. In this error path, the refcount of the pool is\ndecremented as it has incremented before. However, the reference to\nthe pool in the socket was not nulled. This means that when the socket\nis closed later, the socket teardown logic will think that there is a\npool attached to the socket and try to decrease the refcount again,\nleading to a refcount underflow.\n\nI chose this fix as it involved adding just a single line. Another\noption would have been to move xp_get_pool() and the assignment of\nxs->pool to after the if-statement and using xs_umem->pool instead of\nxs->pool in the whole if-statement resulting in somewhat simpler code,\nbut this would have led to much more churn in the code base perhaps\nmaking it harder to backport.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "f7019562f142bc041f9cde63af338d1886585923",
              "status": "affected",
              "versionType": "git",
              "lessThan": "789fcd94c9cac133dd4d96e193188661aca9f6c3"
            },
            {
              "version": "ba3beec2ec1d3b4fd8672ca6e781dac4b3267f6e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "15b453cf7348973217558235b9ece2ee5fea6777"
            },
            {
              "version": "ba3beec2ec1d3b4fd8672ca6e781dac4b3267f6e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3e7722c31d4167eb7f3ffd35aba52cab69b79072"
            },
            {
              "version": "ba3beec2ec1d3b4fd8672ca6e781dac4b3267f6e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "85c2c79a07302fe68a1ad5cc449458cc559e314d"
            },
            {
              "version": "9f0c8a9d4ef1b9ebee0e4ac2495fe790727044aa",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.47",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.127"
            },
            {
              "version": "5.17.15",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.18"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.18",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.18"
            },
            {
              "version": "5.15.127",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.46",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.4.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "version": "6.5",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}