fkie_cve-2024-39495
Vulnerability from fkie_nvd
Published
2024-07-12 13:15
Modified
2024-11-21 09:27
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: greybus: Fix use-after-free bug in gb_interface_release due to race condition. In gb_interface_create, &intf->mode_switch_completion is bound with gb_interface_mode_switch_work. Then it will be started by gb_interface_request_mode_switch. Here is the relevant code. if (!queue_work(system_long_wq, &intf->mode_switch_work)) { ... } If we call gb_interface_release to make cleanup, there may be an unfinished work. This function will call kfree to free the object "intf". However, if gb_interface_mode_switch_work is scheduled to run after kfree, it may cause use-after-free error as gb_interface_mode_switch_work will use the object "intf". The possible execution flow that may lead to the issue is as follows: CPU0 CPU1 | gb_interface_create | gb_interface_request_mode_switch gb_interface_release | kfree(intf) (free) | | gb_interface_mode_switch_work | mutex_lock(&intf->mutex) (use) Fix it by canceling the work before kfree.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03ea2b129344152157418929f06726989efc0445Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0b8fba38bdfb848fac52e71270b2aa3538c996eaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b6bb0b4abfd79b8698ee161bb73c0936a2aaf83Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c9c5d7f26acc2c669c1dcf57d1bb43ee99220cePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74cd0a421896b2e07eafe7da4275302bfecef201Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a733d69a4a59c2d08620e6589d823c24be773dcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb071f5c75d4b1c177824de74ee75f9dd34123b9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/03ea2b129344152157418929f06726989efc0445Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0b8fba38bdfb848fac52e71270b2aa3538c996eaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2b6bb0b4abfd79b8698ee161bb73c0936a2aaf83Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5c9c5d7f26acc2c669c1dcf57d1bb43ee99220cePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/74cd0a421896b2e07eafe7da4275302bfecef201Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9a733d69a4a59c2d08620e6589d823c24be773dcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/fb071f5c75d4b1c177824de74ee75f9dd34123b9Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: Fix use-after-free bug in gb_interface_release due to race condition.\n\nIn gb_interface_create, \u0026intf-\u003emode_switch_completion is bound with\ngb_interface_mode_switch_work. Then it will be started by\ngb_interface_request_mode_switch. Here is the relevant code.\nif (!queue_work(system_long_wq, \u0026intf-\u003emode_switch_work)) {\n\t...\n}\n\nIf we call gb_interface_release to make cleanup, there may be an\nunfinished work. This function will call kfree to free the object\n\"intf\". However, if gb_interface_mode_switch_work is scheduled to\nrun after kfree, it may cause use-after-free error as\ngb_interface_mode_switch_work will use the object \"intf\".\nThe possible execution flow that may lead to the issue is as follows:\n\nCPU0                            CPU1\n\n                            |   gb_interface_create\n                            |   gb_interface_request_mode_switch\ngb_interface_release        |\nkfree(intf) (free)          |\n                            |   gb_interface_mode_switch_work\n                            |   mutex_lock(\u0026intf-\u003emutex) (use)\n\nFix it by canceling the work before kfree."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: greybus: corrigi\u00f3 el error de use-after-free en gb_interface_release debido a la condici\u00f3n de ejecuci\u00f3n. En gb_interface_create, \u0026amp;intf-\u0026gt;mode_switch_completion est\u00e1 vinculado con gb_interface_mode_switch_work. Luego lo iniciar\u00e1 gb_interface_request_mode_switch. Aqu\u00ed est\u00e1 el c\u00f3digo relevante. if (!queue_work(system_long_wq, \u0026amp;intf-\u0026gt;mode_switch_work)) { ... } Si llamamos a gb_interface_release para realizar la limpieza, es posible que haya un trabajo sin terminar. Esta funci\u00f3n llamar\u00e1 a kfree para liberar el objeto \"intf\". Sin embargo, si gb_interface_mode_switch_work est\u00e1 programado para ejecutarse despu\u00e9s de kfree, puede causar un error de use-after-free ya que gb_interface_mode_switch_work usar\u00e1 el objeto \"intf\". El posible flujo de ejecuci\u00f3n que puede provocar el problema es el siguiente: CPU0 CPU1 | gb_interface_create | gb_interface_request_mode_switch gb_interface_release | kfree(intf) (gratis) | | gb_interface_mode_switch_work | mutex_lock(\u0026amp;intf-\u0026gt;mutex) (uso) Solucionarlo cancelando el trabajo antes de kfree."
    }
  ],
  "id": "CVE-2024-39495",
  "lastModified": "2024-11-21T09:27:48.967",
  "metrics": {
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          "confidentialityImpact": "HIGH",
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  "published": "2024-07-12T13:15:12.183",
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}


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