fkie_cve-2024-54683
Vulnerability from fkie_nvd
Published
2025-01-11 13:15
Modified
2025-01-16 15:18
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: IDLETIMER: Fix for possible ABBA deadlock Deletion of the last rule referencing a given idletimer may happen at the same time as a read of its file in sysfs: | ====================================================== | WARNING: possible circular locking dependency detected | 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 Not tainted | ------------------------------------------------------ | iptables/3303 is trying to acquire lock: | ffff8881057e04b8 (kn->active#48){++++}-{0:0}, at: __kernfs_remove+0x20 | | but task is already holding lock: | ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v] | | which lock already depends on the new lock. A simple reproducer is: | #!/bin/bash | | while true; do | iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | done & | while true; do | cat /sys/class/xt_idletimer/timers/testme >/dev/null | done Avoid this by freeing list_mutex right after deleting the element from the list, then continuing with the teardown.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.13
linux linux_kernel 6.13


To clipboard 

{
  "configurations": [
    {
      "nodes": [
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          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: IDLETIMER: Fix for possible ABBA deadlock\n\nDeletion of the last rule referencing a given idletimer may happen at\nthe same time as a read of its file in sysfs:\n\n| ======================================================\n| WARNING: possible circular locking dependency detected\n| 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 Not tainted\n| ------------------------------------------------------\n| iptables/3303 is trying to acquire lock:\n| ffff8881057e04b8 (kn-\u003eactive#48){++++}-{0:0}, at: __kernfs_remove+0x20\n|\n| but task is already holding lock:\n| ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v]\n|\n| which lock already depends on the new lock.\n\nA simple reproducer is:\n\n| #!/bin/bash\n|\n| while true; do\n|         iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n|         iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n| done \u0026\n| while true; do\n|         cat /sys/class/xt_idletimer/timers/testme \u003e/dev/null\n| done\n\nAvoid this by freeing list_mutex right after deleting the element from\nthe list, then continuing with the teardown."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: IDLETIMER: Correcci\u00f3n de un posible bloqueo de ABBA La eliminaci\u00f3n de la \u00faltima regla que hace referencia a un temporizador inactivo determinado puede ocurrir al mismo tiempo que una lectura de su archivo en sysfs: | ======================================================== | ADVERTENCIA: se detect\u00f3 una posible dependencia de bloqueo circular | 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 No contaminado | ------------------------------------------------------ | iptables/3303 est\u00e1 intentando adquirir el bloqueo: | ffff8881057e04b8 (kn-\u0026gt;active#48){++++}-{0:0}, at: __kernfs_remove+0x20 | | pero la tarea ya tiene el bloqueo: | ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v] | | cuyo bloqueo ya depende del nuevo bloqueo. Un reproductor simple es: | #!/bin/bash | | mientras es verdadero; hacer | iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\" | iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\" | hecho \u0026amp; | mientras es verdadero; hacer | cat /sys/class/xt_idletimer/timers/testme \u0026gt;/dev/null | Evite esto liberando list_mutex inmediatamente despu\u00e9s de eliminar el elemento de la lista y luego contin\u00fae con el desmontaje."
    }
  ],
  "id": "CVE-2024-54683",
  "lastModified": "2025-01-16T15:18:09.453",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-01-11T13:15:27.490",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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