CVE-2024-26715: usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend
First published: Wed Apr 03 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/36695d5eeeefe5a64b47d0336e7c8fc144e78182
- https://git.kernel.org/stable/c/57e2e42ccd3cd6183228269715ed032f44536751
- https://git.kernel.org/stable/c/61a348857e869432e6a920ad8ea9132e8d44c316
- https://git.kernel.org/stable/c/88936ceab6b426f1312327e9ef849c215c6007a7
- https://git.kernel.org/stable/c/c7ebd8149ee519d27232e6e4940e9c02071b568b
- https://launchpad.net/bugs/cve/CVE-2024-26715
- https://git.kernel.org/linus/61a348857e869432e6a920ad8ea9132e8d44c316
- https://security-tracker.debian.org/tracker/CVE-2024-26715
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26715
- https://nvd.nist.gov/vuln/detail/CVE-2024-26715
- https://ubuntu.com/security/CVE-2024-26715
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