GHSA-X9JQ-3W57-M487

Vulnerability from github – Published: 2026-04-01 09:31 – Updated: 2026-04-18 09:30
VLAI?
Details

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

apparmor: replace recursive profile removal with iterative approach

The profile removal code uses recursion when removing nested profiles, which can lead to kernel stack exhaustion and system crashes.

Reproducer: $ pf='a'; for ((i=0; i<1024; i++)); do echo -e "profile $pf { \n }" | apparmor_parser -K -a; pf="$pf//x"; done $ echo -n a > /sys/kernel/security/apparmor/.remove

Replace the recursive __aa_profile_list_release() approach with an iterative approach in __remove_profile(). The function repeatedly finds and removes leaf profiles until the entire subtree is removed, maintaining the same removal semantic without recursion.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23404"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-01T09:16:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: replace recursive profile removal with iterative approach\n\nThe profile removal code uses recursion when removing nested profiles,\nwhich can lead to kernel stack exhaustion and system crashes.\n\nReproducer:\n  $ pf=\u0027a\u0027; for ((i=0; i\u003c1024; i++)); do\n      echo -e \"profile $pf { \\n }\" | apparmor_parser -K -a;\n      pf=\"$pf//x\";\n  done\n  $ echo -n a \u003e /sys/kernel/security/apparmor/.remove\n\nReplace the recursive __aa_profile_list_release() approach with an\niterative approach in __remove_profile(). The function repeatedly\nfinds and removes leaf profiles until the entire subtree is removed,\nmaintaining the same removal semantic without recursion.",
  "id": "GHSA-x9jq-3w57-m487",
  "modified": "2026-04-18T09:30:19Z",
  "published": "2026-04-01T09:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23404"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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