GHSA-2CQV-6948-3374

Vulnerability from github – Published: 2025-04-16 15:34 – Updated: 2025-04-16 15:34
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

exec: fix the racy usage of fs_struct->in_exec

check_unsafe_exec() sets fs->in_exec under cred_guard_mutex, then execve() paths clear fs->in_exec lockless. This is fine if exec succeeds, but if it fails we have the following race:

T1 sets fs->in_exec = 1, fails, drops cred_guard_mutex

T2 sets fs->in_exec = 1

T1 clears fs->in_exec

T2 continues with fs->in_exec == 0

Change fs/exec.c to clear fs->in_exec with cred_guard_mutex held.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22029"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:15:55Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nexec: fix the racy usage of fs_struct-\u003ein_exec\n\ncheck_unsafe_exec() sets fs-\u003ein_exec under cred_guard_mutex, then execve()\npaths clear fs-\u003ein_exec lockless. This is fine if exec succeeds, but if it\nfails we have the following race:\n\n\tT1 sets fs-\u003ein_exec = 1, fails, drops cred_guard_mutex\n\n\tT2 sets fs-\u003ein_exec = 1\n\n\tT1 clears fs-\u003ein_exec\n\n\tT2 continues with fs-\u003ein_exec == 0\n\nChange fs/exec.c to clear fs-\u003ein_exec with cred_guard_mutex held.",
  "id": "GHSA-2cqv-6948-3374",
  "modified": "2025-04-16T15:34:39Z",
  "published": "2025-04-16T15:34:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22029"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/753a620a7f8e134b444f89fe90873234e894e21a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6b5070721503fb6021ebed51c925ffc66b1c5ab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af7bb0d2ca459f15cb5ca604dab5d9af103643f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b519f2e5800fe2391b7545ba6889df795828e885"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2d8e7bd3314485e0b3b08380c659b3d1d67ed6a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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