{
  "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-2026-22980",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-22980",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-01-23T15:24:02.924Z",
    "updatedAt": "2026-10-19T18:25:26.011Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "nfsd: provide locking for v4_end_grace",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: provide locking for v4_end_grace\n\nWriting to v4_end_grace can race with server shutdown and result in\nmemory being accessed after it was freed - reclaim_str_hashtbl in\nparticularly.\n\nWe cannot hold nfsd_mutex across the nfsd4_end_grace() call as that is\nheld while client_tracking_op->init() is called and that can wait for\nan upcall to nfsdcltrack which can write to v4_end_grace, resulting in a\ndeadlock.\n\nnfsd4_end_grace() is also called by the landromat work queue and this\ndoesn't require locking as server shutdown will stop the work and wait\nfor it before freeing anything that nfsd4_end_grace() might access.\n\nHowever, we must be sure that writing to v4_end_grace doesn't restart\nthe work item after shutdown has already waited for it.  For this we\nadd a new flag protected with nn->client_lock.  It is set only while it\nis safe to make client tracking calls, and v4_end_grace only schedules\nwork while the flag is set with the spinlock held.\n\nSo this patch adds a nfsd_net field \"client_tracking_active\" which is\nset as described.  Another field \"grace_end_forced\", is set when\nv4_end_grace is written.  After this is set, and providing\nclient_tracking_active is set, the laundromat is scheduled.\nThis \"grace_end_forced\" field bypasses other checks for whether the\ngrace period has finished.\n\nThis resolves a race which can result in use-after-free.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ca97360860eb02e3ae4ba42c19b439a0fcecbf06"
            },
            {
              "version": "7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e8bfa2401d4c51eca6e48e9b33c798828ca9df61"
            },
            {
              "version": "7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "34eb22836e0cdba093baac66599d68c4cd245a9d"
            },
            {
              "version": "7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "06600719d0f7a723811c45e4d51f5b742f345309"
            },
            {
              "version": "7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ba4811c8b433bfa681729ca42cc62b6034f223b0"
            },
            {
              "version": "7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "53f07d095e7e680c5e4569a55a019f2c0348cdc6"
            },
            {
              "version": "7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2857bd59feb63fcf40fe4baf55401baea6b4feb4"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.18",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.18"
            },
            {
              "version": "5.10.248",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.198",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.161",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.121",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.66",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}