{
  "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-2022-50675",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50675",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-09T01:29:27.926Z",
    "updatedAt": "2026-05-11T19:23:36.334Z",
    "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": "arm64: mte: Avoid setting PG_mte_tagged if no tags cleared or restored",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mte: Avoid setting PG_mte_tagged if no tags cleared or restored\n\nPrior to commit 69e3b846d8a7 (\"arm64: mte: Sync tags for pages where PTE\nis untagged\"), mte_sync_tags() was only called for pte_tagged() entries\n(those mapped with PROT_MTE). Therefore mte_sync_tags() could safely use\ntest_and_set_bit(PG_mte_tagged, &page->flags) without inadvertently\nsetting PG_mte_tagged on an untagged page.\n\nThe above commit was required as guests may enable MTE without any\ncontrol at the stage 2 mapping, nor a PROT_MTE mapping in the VMM.\nHowever, the side-effect was that any page with a PTE that looked like\nswap (or migration) was getting PG_mte_tagged set automatically. A\nsubsequent page copy (e.g. migration) copied the tags to the destination\npage even if the tags were owned by KASAN.\n\nThis issue was masked by the page_kasan_tag_reset() call introduced in\ncommit e5b8d9218951 (\"arm64: mte: reset the page tag in page->flags\").\nWhen this commit was reverted (20794545c146), KASAN started reporting\naccess faults because the overriding tags in a page did not match the\noriginal page->flags (with CONFIG_KASAN_HW_TAGS=y):\n\n  BUG: KASAN: invalid-access in copy_page+0x10/0xd0 arch/arm64/lib/copy_page.S:26\n  Read at addr f5ff000017f2e000 by task syz-executor.1/2218\n  Pointer tag: [f5], memory tag: [f2]\n\nMove the PG_mte_tagged bit setting from mte_sync_tags() to the actual\nplace where tags are cleared (mte_sync_page_tags()) or restored\n(mte_restore_tags()).",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "69e3b846d8a753f9f279f29531ca56b0f7563ad0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "918002bdbe4328c8c0164a22e8ebf2384b80dc23"
            },
            {
              "version": "69e3b846d8a753f9f279f29531ca56b0f7563ad0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "749e9fc18b1e1a3f93a9512e91bd7f93002d2821"
            },
            {
              "version": "69e3b846d8a753f9f279f29531ca56b0f7563ad0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a8e5e5146ad08d794c58252bab00b261045ef16d"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.14"
            },
            {
              "version": "5.15.82",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}