{
  "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-2025-40155",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40155",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-11-12T10:23:28.718Z",
    "updatedAt": "2026-08-05T12:08:07.016Z",
    "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": "iommu/vt-d: debugfs: Fix legacy mode page table dump logic",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: debugfs: Fix legacy mode page table dump logic\n\nIn legacy mode, SSPTPTR is ignored if TT is not 00b or 01b. SSPTPTR\nmaybe uninitialized or zero in that case and may cause oops like:\n\n Oops: general protection fault, probably for non-canonical address\n       0xf00087d3f000f000: 0000 [#1] SMP NOPTI\n CPU: 2 UID: 0 PID: 786 Comm: cat Not tainted 6.16.0 #191 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-5.fc42 04/01/2014\n RIP: 0010:pgtable_walk_level+0x98/0x150\n RSP: 0018:ffffc90000f279c0 EFLAGS: 00010206\n RAX: 0000000040000000 RBX: ffffc90000f27ab0 RCX: 000000000000001e\n RDX: 0000000000000003 RSI: f00087d3f000f000 RDI: f00087d3f0010000\n RBP: ffffc90000f27a00 R08: ffffc90000f27a98 R09: 0000000000000002\n R10: 0000000000000000 R11: 0000000000000000 R12: f00087d3f000f000\n R13: 0000000000000000 R14: 0000000040000000 R15: ffffc90000f27a98\n FS:  0000764566dcb740(0000) GS:ffff8881f812c000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000764566d44000 CR3: 0000000109d81003 CR4: 0000000000772ef0\n PKRU: 55555554\n Call Trace:\n  <TASK>\n  pgtable_walk_level+0x88/0x150\n  domain_translation_struct_show.isra.0+0x2d9/0x300\n  dev_domain_translation_struct_show+0x20/0x40\n  seq_read_iter+0x12d/0x490\n...\n\nAvoid walking the page table if TT is not 00b or 01b.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2b437e80456654df3980706384065d444f4bb54d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8cf7b59c49f9118fa875462e18686cb6b131bb5"
            },
            {
              "version": "2b437e80456654df3980706384065d444f4bb54d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "df2bf759a0bdb71f13e327d7527260d09facc055"
            },
            {
              "version": "2b437e80456654df3980706384065d444f4bb54d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fbe6070c73badca726e4ff7877320e6c62339917"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.7"
            },
            {
              "version": "6.12.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}