{
  "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-2022-50446",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50446",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-10-01T11:45:20.854Z",
    "updatedAt": "2026-05-11T19:19:39.140Z",
    "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": "ARC: mm: fix leakage of memory allocated for PTE",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nARC: mm: fix leakage of memory allocated for PTE\n\nSince commit d9820ff (\"ARC: mm: switch pgtable_t back to struct page *\")\na memory leakage problem occurs. Memory allocated for page table entries\nnot released during process termination. This issue can be reproduced by\na small program that allocates a large amount of memory. After several\nruns, you'll see that the amount of free memory has reduced and will\ncontinue to reduce after each run. All ARC CPUs are effected by this\nissue. The issue was introduced since the kernel stable release v5.15-rc1.\n\nAs described in commit d9820ff after switch pgtable_t back to struct\npage *, a pointer to \"struct page\" and appropriate functions are used to\nallocate and free a memory page for PTEs, but the pmd_pgtable macro hasn't\nchanged and returns the direct virtual address from the PMD (PGD) entry.\nThan this address used as a parameter in the __pte_free() and as a result\nthis function couldn't release memory page allocated for PTEs.\n\nFix this issue by changing the pmd_pgtable macro and returning pointer to\nstruct page.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d9820ff76f95fa26d33e412254a89cd65b23142d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "14009ada5712649589ab4ad0441b811780ea8773"
            },
            {
              "version": "d9820ff76f95fa26d33e412254a89cd65b23142d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d83a69966e8b6ae9dd447f3ac704c0223bceb7f7"
            },
            {
              "version": "d9820ff76f95fa26d33e412254a89cd65b23142d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4fd9df10cb7a9289fbd22d669f9f98164d95a1ce"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.15"
            },
            {
              "version": "5.15.77",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}