CVE-2026-23404 (GCVE-0-2026-23404)
Vulnerability from cvelistv5
Published
2026-04-01 08:36
Modified
2026-04-18 08:58
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
Version: c88d4c7b049e87998ac0a9f455aa545cc895ef92
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-18T08:58:37.883Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342"
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        {
          "url": "https://git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886"
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          "url": "https://git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1"
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        {
          "url": "https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747"
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      "title": "apparmor: replace recursive profile removal with iterative approach",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23404",
    "datePublished": "2026-04-01T08:36:35.032Z",
    "dateReserved": "2026-01-13T15:37:46.012Z",
    "dateUpdated": "2026-04-18T08:58:37.883Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}


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