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CVE-2025-40201 kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths

🗓️ 12 Nov 2025 21:56:34Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

Kernel fix for racy task_lock on group_leader in sys_prlimit64; now uses tasklist_lock.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/sys.c"
    ],
    "versions": [
      {
        "version": "18c91bb2d87268d23868bf13508f5bc9cf04e89a",
        "lessThan": "1bc0d9315ef5296abb2c9fd840336255850ded18",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "18c91bb2d87268d23868bf13508f5bc9cf04e89a",
        "lessThan": "132f827e7bac7373e1522e89709d70b43cae5342",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "18c91bb2d87268d23868bf13508f5bc9cf04e89a",
        "lessThan": "19b45c84bd9fd42fa97ff80c6350d604cb871c75",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "18c91bb2d87268d23868bf13508f5bc9cf04e89a",
        "lessThan": "6796412decd2d8de8ec708213bbc958fab72f143",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "18c91bb2d87268d23868bf13508f5bc9cf04e89a",
        "lessThan": "a15f37a40145c986cdf289a4b88390f35efdecc4",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/sys.c"
    ],
    "versions": [
      {
        "version": "5.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.18",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.157",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.113",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.54",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.17.4",
        "lessThanOrEqual": "6.17.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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