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PUBLISHED

CVE-2024-26715

usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend

Reserved:2024-02-19
Published:2024-04-03
Updated:2024-04-03

Description

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend In current scenario if Plug-out and Plug-In performed continuously there could be a chance while checking for dwc->gadget_driver in dwc3_gadget_suspend, a NULL pointer dereference may occur. Call Stack: CPU1: CPU2: gadget_unbind_driver dwc3_suspend_common dwc3_gadget_stop dwc3_gadget_suspend dwc3_disconnect_gadget CPU1 basically clears the variable and CPU2 checks the variable. Consider CPU1 is running and right before gadget_driver is cleared and in parallel CPU2 executes dwc3_gadget_suspend where it finds dwc->gadget_driver which is not NULL and resumes execution and then CPU1 completes execution. CPU2 executes dwc3_disconnect_gadget where it checks dwc->gadget_driver is already NULL because of which the NULL pointer deference occur.

Product status

Default status
unaffected

9772b47a4c29 before 88936ceab6b4
affected

9772b47a4c29 before 57e2e42ccd3c
affected

9772b47a4c29 before c7ebd8149ee5
affected

9772b47a4c29 before 36695d5eeeef
affected

9772b47a4c29 before 61a348857e86
affected

Default status
affected

4.6
affected

Any version before 4.6
unaffected

5.15.149
unaffected

6.1.79
unaffected

6.6.18
unaffected

6.7.6
unaffected

6.8
unaffected

References

https://git.kernel.org/stable/c/88936ceab6b426f1312327e9ef849c215c6007a7

https://git.kernel.org/stable/c/57e2e42ccd3cd6183228269715ed032f44536751

https://git.kernel.org/stable/c/c7ebd8149ee519d27232e6e4940e9c02071b568b

https://git.kernel.org/stable/c/36695d5eeeefe5a64b47d0336e7c8fc144e78182

https://git.kernel.org/stable/c/61a348857e869432e6a920ad8ea9132e8d44c316

cve.org CVE-2024-26715

nvd.nist.gov CVE-2024-26715

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