{
  "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-2026-43491",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-43491",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-19T10:44:23.832Z",
    "updatedAt": "2026-08-19T16:27:59.057Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "net: qrtr: ns: Limit the maximum server registration per node",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: ns: Limit the maximum server registration per node\n\nCurrent code does no bound checking on the number of servers added per\nnode. A malicious client can flood NEW_SERVER messages and exhaust memory.\n\nFix this issue by limiting the maximum number of server registrations to\n256 per node. If the NEW_SERVER message is received for an old port, then\ndon't restrict it as it will get replaced. While at it, also rate limit\nthe error messages in the failure path of qrtr_ns_worker().\n\nNote that the limit of 256 is chosen based on the current platform\nrequirements. If requirement changes in the future, this limit can be\nincreased.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b48fc702b20233b809f01053232c3cd5083c97b4"
            },
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "991c431077b19176d3fe3bb54054c063776a8cdc"
            },
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "94914731ca0b99899dceadd80d2df00584a688ca"
            },
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"
            },
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3efaad55cad1ded429e3a873bfece389058a526b"
            },
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"
            },
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "868202aa2adae427060a42d5bd663b4d782ec02c"
            },
            {
              "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d5ee2ff98322337951c56398e79d51815acbf955"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.7"
            },
            {
              "version": "5.10.265",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.216",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.183",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.86",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.27",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}