{
  "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-2025-39880",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-39880",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-09-23T06:00:49.897Z",
    "updatedAt": "2026-10-15T22:02:32.742Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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": "libceph: fix invalid accesses to ceph_connection_v1_info",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix invalid accesses to ceph_connection_v1_info\n\nThere is a place where generic code in messenger.c is reading and\nanother place where it is writing to con->v1 union member without\nchecking that the union member is active (i.e. msgr1 is in use).\n\nOn 64-bit systems, con->v1.auth_retry overlaps with con->v2.out_iter,\nso such a read is almost guaranteed to return a bogus value instead of\n0 when msgr2 is in use.  This ends up being fairly benign because the\nside effect is just the invalidation of the authorizer and successive\nfetching of new tickets.\n\ncon->v1.connect_seq overlaps with con->v2.conn_bufs and the fact that\nit's being written to can cause more serious consequences, but luckily\nit's not something that happens often.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "cd1a677cad994021b19665ed476aea63f5d54f31",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ea12ab684f8ae8a6da11a22c78d94a79e2163096"
            },
            {
              "version": "cd1a677cad994021b19665ed476aea63f5d54f31",
              "status": "affected",
              "versionType": "git",
              "lessThan": "591ea9c30737663a471b2bb07b27ddde86b020d5"
            },
            {
              "version": "cd1a677cad994021b19665ed476aea63f5d54f31",
              "status": "affected",
              "versionType": "git",
              "lessThan": "23538cfbeed87159a5ac6c61e7a6de3d8d4486a8"
            },
            {
              "version": "cd1a677cad994021b19665ed476aea63f5d54f31",
              "status": "affected",
              "versionType": "git",
              "lessThan": "35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983"
            },
            {
              "version": "cd1a677cad994021b19665ed476aea63f5d54f31",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6bd8b56899be0b514945f639a89ccafb8f8dfaef"
            },
            {
              "version": "cd1a677cad994021b19665ed476aea63f5d54f31",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cdbc9836c7afadad68f374791738f118263c5371"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.11"
            },
            {
              "version": "5.15.194",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.153",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.107",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.48",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.16.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "version": "6.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}