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CVE-2026-89766 pidfd: hold exec_update_lock around namespace ioctl

🗓️ 11 Sep 2026 19:47:06Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 5 Views

pidfd namespace ioctl in Linux kernel allows accessing namespace after target execve()s with new credentials.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-89766
11 Sep 202619:47
cve
nvd
NVD
CVE-2026-89766
11 Sep 202620:20
nvd
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/pidfs.c"
    ],
    "versions": [
      {
        "version": "5b08bd408534bfb3a7cf5778da5b27d4e4fffe12",
        "lessThan": "cf24ce48d60225fdbee68ed2058763a1fd172ff3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5b08bd408534bfb3a7cf5778da5b27d4e4fffe12",
        "lessThan": "e89318aa8629969e86548b05e7c19283af3f0efb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5b08bd408534bfb3a7cf5778da5b27d4e4fffe12",
        "lessThan": "9688a46802939da28f00cb40e8129615d5d4af39",
        "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/pidfs.c"
    ],
    "versions": [
      {
        "version": "6.11",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.11",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.51",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.4",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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