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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2024-26715
HistoryApr 03, 2024 - 3:15 p.m.

CVE-2024-26715

2024-04-0315:15:53
Debian Security Bug Tracker
security-tracker.debian.org
9
linux kernel
usb vulnerability
null pointer dereference
dwc3 gadget
plug-out
plug-in
dwc3_gadget_suspend

7.2 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.7%

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.

7.2 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.7%