CVE-2023-52836

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-52836
In the Linux kernel, the following vulnerability has been resolved: locking/ww_mutex/test: Fix potential workqueue corruption In some cases running with the test-ww_mutex code, I was seeing odd behavior where sometimes it seemed flush_workqueue was returning before all the work threads were finished. Often this would cause strange crashes as the mutexes would be freed while they were being used. Looking at the code, there is a lifetime problem as the controlling thread that spawns the work allocates the "struct stress" structures that are passed to the workqueue threads. Then when the workqueue threads are finished, they free the stress struct that was passed to them. Unfortunately the workqueue work_struct node is in the stress struct. Which means the work_struct is freed before the work thread returns and while flush_workqueue is waiting. It seems like a better idea to have the controlling thread both allocate and free the stress structures, so that we can be sure we don't corrupt the workqueue by freeing the structure prematurely. So this patch reworks the test to do so, and with this change I no longer see the early flush_workqueue returns.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 Patch
https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 Patch
https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e Patch
https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc Patch
https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 Patch
https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 Patch
https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 Patch
https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c Patch
https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3 Patch
https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 Patch
https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 Patch
https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e Patch
https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc Patch
https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 Patch
https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 Patch
https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 Patch
https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c Patch
https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

23 Sep 2025, 23:20

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-787
References () https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 - () https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 - Patch
References () https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 - () https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 - Patch
References () https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e - () https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e - Patch
References () https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc - () https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc - Patch
References () https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 - () https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 - Patch
References () https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 - () https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 - Patch
References () https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 - () https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 - Patch
References () https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c - () https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c - Patch
References () https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3 - () https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3 - Patch
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

21 Nov 2024, 08:40

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 - () https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 -
References () https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 - () https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 -
References () https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e - () https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e -
References () https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc - () https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc -
References () https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 - () https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 -
References () https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 - () https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 -
References () https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 - () https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 -
References () https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c - () https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c -
References () https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3 - () https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3 -
Summary
  • (es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: lock/ww_mutex/test: soluciona una posible corrupción de la cola de trabajo. En algunos casos, al ejecutar el código test-ww_mutex, veía un comportamiento extraño en el que a veces parecía que flush_workqueue regresaba antes que todos los subprocesos de trabajo. hemos terminado. A menudo, esto causaría fallas extrañas ya que los mutex se liberarían mientras se estaban usando. Al observar el código, hay un problema de duración, ya que el subproceso de control que genera el trabajo asigna las estructuras de "estrés de estructura" que se pasan a los subprocesos de la cola de trabajo. Luego, cuando los subprocesos de la cola de trabajo finalizan, liberan la estructura de tensión que se les pasó. Desafortunadamente, el nodo work_struct de la cola de trabajo está en la estructura de estrés. Lo que significa que work_struct se libera antes de que regrese el hilo de trabajo y mientras descarga_workqueue está esperando. Parece una mejor idea que el subproceso de control asigne y libere las estructuras de tensión, de modo que podamos estar seguros de no corromper la cola de trabajo al liberar la estructura prematuramente. Entonces, este parche reelabora la prueba para hacerlo, y con este cambio ya no veo los primeros retornos de Flush_workqueue.

21 May 2024, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-21 16:15

Updated : 2025-09-23 23:20

NVD link : CVE-2023-52836

Mitre link : CVE-2023-52836

CVE.ORG link : CVE-2023-52836

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-787

Out-of-bounds Write