CVE-2026-31755

Summary

In the Linux kernel, the following vulnerability has been resolved:

usb: cdns3: gadget: fix NULL pointer dereference in ep_queue

When the gadget endpoint is disabled or not yet configured, the ep->desc pointer can be NULL. This leads to a NULL pointer dereference when __cdns3_gadget_ep_queue() is called, causing a kernel crash.

Add a check to return -ESHUTDOWN if ep->desc is NULL, which is the standard return code for unconfigured endpoints.

This prevents potential crashes when ep_queue is called on endpoints that are not ready.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < 3cf0580a09d417eab41ce914a11f9cde3a121871affected
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < 3d1433fe34b224b90259e207e5389e95b504ef04affected
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6affected
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < 9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9affected
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < d61446dfc9d387775bb1b95b081953201b9222afaffected
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < 390536cc6af4ca5566bc3bf1f8b704700380cd2caffected
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < 14bf08ab2cdfcdfd3f13e799d06692a1b3e0745faffected
LinuxLinux7733f6c32e36ff9d7adadf40001039bf219b1cbe < 7f6f127b9bc34bed35f56faf7ecb1561d6b39000affected
LinuxLinux5.4affected
LinuxLinux0 < 5.4unaffected
LinuxLinux5.10.260 <= 5.10.*unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.168 <= 6.1.*unaffected
LinuxLinux6.6.134 <= 6.6.*unaffected
LinuxLinux6.12.81 <= 6.12.*unaffected
LinuxLinux6.18.22 <= 6.18.*unaffected
LinuxLinux6.19.12 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References