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CVE-2026-68166 userfaultfd: prevent registration of special VMAs

🗓️ 10 Aug 2026 11:59:34Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

userfaultfd now rejects shadow stack and special VMAs, and excludes hugetlb from special checks.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-68166
10 Aug 202611:59
cve
debiancve
Debian CVE
CVE-2026-68166
10 Aug 202611:59
debiancve
euvd
EUVD
EUVD-2026-55552
10 Aug 202611:59
euvd
nvd
NVD
CVE-2026-68166
10 Aug 202613:20
nvd
osv
OSV
DEBIAN-CVE-2026-68166
10 Aug 202613:20
osv
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/userfaultfd.c"
    ],
    "versions": [
      {
        "version": "54007f818206dc27309ca423df4c87dd160a7208",
        "lessThan": "165613191ad9d034bf17c00e3a142f9561597ec5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "54007f818206dc27309ca423df4c87dd160a7208",
        "lessThan": "0c26202b157f1efc3cd2f26f5c30f59b508a6a5d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "54007f818206dc27309ca423df4c87dd160a7208",
        "lessThan": "3c58f641e813c3c71039f8fd4d4e2a3aab713288",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/userfaultfd.c"
    ],
    "versions": [
      {
        "version": "6.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.6",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.44",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.6",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc5",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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