{
  "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-2026-89549",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89549",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-11T19:44:23.928Z",
    "updatedAt": "2026-10-19T08:48:42.059Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "sunrpc: route to a populated pool in svc_pool_for_cpu()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: route to a populated pool in svc_pool_for_cpu()\n\nsvc_set_num_threads() spreads the requested threads evenly across the\nservice's pools (base = nrservs / sv_nrpools).  When a service runs\nfewer threads than it has pools -- e.g. an nfsd configured with fewer\nthreads than the host has NUMA nodes while running in \"pernode\" or\n\"percpu\" mode -- the trailing pools are left with no threads at all.\n\nsvc_xprt_enqueue() selects a pool from the CPU servicing the transport,\nqueues the transport on that pool's sp_xprts, and only wakes a thread\nfrom the same pool.  Each thread services exclusively its own pool, so a\ntransport that lands on a threadless pool is enqueued on sp_xprts and\nnever picked up: the connection hangs indefinitely.\n\nHave svc_pool_for_cpu() skip pools that currently have no threads,\nfalling back to the next populated pool.  This trades NUMA locality for\na guarantee that the work is actually serviced.  sp_nrthreads is only\nupdated under the service mutex; the lockless read here is a best-effort\nrouting hint, so annotate it with data_race().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9accc25e5af0bac8479f6054e674b2c593c45281"
            },
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6f66d38e2a6c78d48723ea17ad86135ec80ca24b"
            },
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d79d7b9e8acbb53e2d60f6b24afc13e2f15e691f"
            },
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "edb20e8c03aebacb409968c99d046f509c6c485a"
            },
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "011479cf9a7657d4a3e7cc42a784ac63df594170"
            },
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9d04d64ad192439835ed9884d767353061c3ed6f"
            },
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8f766d2d0b4dabf54f8b35812df2b4f481d13316"
            },
            {
              "version": "bfd241600a3b0db4fe43c859f1460d0a958d924a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f6310491c4cdb88af73aa551ec9df1f10a90c709"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.19"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}