{
  "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-2026-64318",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64318",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-25T08:49:47.690Z",
    "updatedAt": "2026-08-17T04:53:18.783Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "partitions: aix: bound the pp_count scan to the ppe array",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\npartitions: aix: bound the pp_count scan to the ppe array\n\naix_partition() reads the physical volume descriptor into a fixed-size\nstruct pvd and then scans its physical-partition-extent array:\n\n\tint numpps = be16_to_cpu(pvd->pp_count);\n\t...\n\tfor (i = 0; i < numpps; i += 1) {\n\t\tstruct ppe *p = pvd->ppe + i;\n\t\t...\n\t\tlp_ix = be16_to_cpu(p->lp_ix);\n\npvd points at a single kmalloc()'d struct pvd whose ppe[] member holds a\nfixed ARRAY_SIZE(pvd->ppe) (1016) entries, but the loop runs up to the\non-disk pp_count.  pp_count is an unvalidated __be16 read straight from\nthe descriptor, so a crafted AIX image with pp_count larger than 1016\ndrives the loop to read pvd->ppe[i] past the end of the allocation (up\nto 65535 entries, ~2 MB out of bounds).\n\nThe partition scan runs without mounting anything, when a block device\nwith a crafted AIX/IBM partition table appears (an attacker-supplied\nimage attached with losetup -P, or a device auto-scanned by udev), via\nmsdos_partition() -> aix_partition().\n\nClamp the scan to the number of entries the ppe[] array can hold.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "09861651617ba0fec089e8b9477439e68398c110"
            },
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5eacdb1967378f5e5591cd27a2d8cdee2df1a599"
            },
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b5e9c09309e18fd9839ad007c238120353ca0cc4"
            },
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fd94a779020f2ecc8b2607f4c20b34acb1763b9a"
            },
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4671bb74bba05fdd4acf670a35758c29e8c97b83"
            },
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ce93228e2193a17d2c58b656e439bb39fe5c3af8"
            },
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e"
            },
            {
              "version": "6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2dc0bfd2fe355fb930de63c2f2eb8ced8570c579"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.11"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.96",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.39",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}