{
  "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-2022-50093",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50093",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-06-18T11:02:31.966Z",
    "updatedAt": "2026-05-11T19:12:41.727Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "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: avoid invalid memory access via node_online(NUMA_NO_NODE)",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)\n\nKASAN reports:\n\n[ 4.668325][ T0] BUG: KASAN: wild-memory-access in dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)\n[    4.676149][    T0] Read of size 8 at addr 1fffffff85115558 by task swapper/0/0\n[    4.683454][    T0]\n[    4.685638][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc3-00004-g0e862838f290 #1\n[    4.694331][    T0] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016\n[    4.703196][    T0] Call Trace:\n[    4.706334][    T0]  <TASK>\n[ 4.709133][ T0] ? dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)\n\nafter converting the type of the first argument (@nr, bit number)\nof arch_test_bit() from `long` to `unsigned long`[0].\n\nUnder certain conditions (for example, when ACPI NUMA is disabled\nvia command line), pxm_to_node() can return %NUMA_NO_NODE (-1).\nIt is valid 'magic' number of NUMA node, but not valid bit number\nto use in bitops.\nnode_online() eventually descends to test_bit() without checking\nfor the input, assuming it's on caller side (which might be good\nfor perf-critical tasks). There, -1 becomes %ULONG_MAX which leads\nto an insane array index when calculating bit position in memory.\n\nFor now, add an explicit check for @node being not %NUMA_NO_NODE\nbefore calling test_bit(). The actual logics didn't change here\nat all.\n\n[0] https://github.com/norov/linux/commit/0e862838f290147ea9c16db852d8d494b552d38d",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ee34b32d8c2950f66038c8975747ef9aec855289",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b12304984654d8e58a2b22ff94c4410906d6267f"
            },
            {
              "version": "ee34b32d8c2950f66038c8975747ef9aec855289",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5659efdadf04b56707d58c1b758df16d2e0eff2c"
            },
            {
              "version": "ee34b32d8c2950f66038c8975747ef9aec855289",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0b4c0003aeda32a600f95df53b2848da8a5aa3fa"
            },
            {
              "version": "ee34b32d8c2950f66038c8975747ef9aec855289",
              "status": "affected",
              "versionType": "git",
              "lessThan": "73ce2046e04ad488cecc66757c36cbe1bdf089d4"
            },
            {
              "version": "ee34b32d8c2950f66038c8975747ef9aec855289",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa"
            },
            {
              "version": "ee34b32d8c2950f66038c8975747ef9aec855289",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b0b0b77ea611e3088e9523e60860f4f41b62b235"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.33",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.33"
            },
            {
              "version": "5.4.211",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.137",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.61",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.18.18",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "version": "5.19.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.19.*"
            },
            {
              "version": "6.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}