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CVE-2026-72379 fs: refuse O_TMPFILE creation with an unmapped fsuid or fsgid

🗓️ 15 Aug 2026 05:56:12Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 37 Views

Linux kernel vfs_tmpfile lacks fsuidgid_has_mapping check, allowing O_TMPFILE creation with invalid uid/gid on idmapped mounts.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/namei.c"
    ],
    "versions": [
      {
        "version": "8e5389132ab429604c1a2459b52f0c849a71cc61",
        "lessThan": "bac8fb0d60254846f3b56957435dcd870ae12948",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8e5389132ab429604c1a2459b52f0c849a71cc61",
        "lessThan": "503d0568a525b168d9aa5ca046ec72fc5477df84",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8e5389132ab429604c1a2459b52f0c849a71cc61",
        "lessThan": "a2038514e69371eb493083a6a897ed20fcbb8acb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8e5389132ab429604c1a2459b52f0c849a71cc61",
        "lessThan": "47e434da476b5a8bcd1e6e52ab03c5ee7764ee78",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8e5389132ab429604c1a2459b52f0c849a71cc61",
        "lessThan": "539dce1144651f7976fa418e618b0b574bf15eeb",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/namei.c"
    ],
    "versions": [
      {
        "version": "5.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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