{
  "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-2025-21639",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21639",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-01-19T10:17:56.828Z",
    "updatedAt": "2026-10-15T01:02:42.114Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "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": "sctp: sysctl: rto_min/max: avoid using current->nsproxy",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: sysctl: rto_min/max: avoid using current->nsproxy\n\nAs mentioned in a previous commit of this series, using the 'net'\nstructure via 'current' is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader's/writer's netns vs only\n  from the opener's netns.\n\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe 'net' structure can be obtained from the table->data using\ncontainer_of().\n\nNote that table->data could also be used directly, as this is the only\nmember needed from the 'net' structure, but that would increase the size\nof this fix, to use '*data' everywhere 'net->sctp.rto_min/max' is used.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9"
            },
            {
              "version": "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "246428bfb9e7db15c5cd08e1d0eca41b65af2b06"
            },
            {
              "version": "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f78f09466744589e420935e646ae78212a38290"
            },
            {
              "version": "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482"
            },
            {
              "version": "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f"
            },
            {
              "version": "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c87f1f6ade56c711f8736901e330685b453e420e"
            },
            {
              "version": "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9fc17b76fc70763780aa78b38fcf4742384044a5"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.13"
            },
            {
              "version": "5.4.290",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.234",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.177",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.125",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.72",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}