IT

Tracker / CVE-2026-31756

CVE-2026-31756

Medium 5.5

In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop() dwc2_gadget_exit_clock_gating() internally calls call_gadget() macro, which expects hsotg->lock to be held since it does spin_unlock/spin_lock around the gadget driver callback invocation. However, dwc2_hsotg_udc_stop() calls dwc2_gadget_exit_clock_gating() without holding the lock. This leads to: - spin_unlock on a lock that is not held (undefined behavior) - The lock remaining held after dwc2_gadget_exit_clock_gating() returns, causing a deadlock when spin_lock_irqsave() is called later in the same function. Fix this by acquiring hsotg->lock before calling dwc2_gadget_exit_clock_gating() and releasing it afterwards, which satisfies the locking requirement of the call_gadget() macro.

Affected products and versions

linux linux_kernel
linux linux_kernel · 5.15.187 → 5.15.203
linux linux_kernel · 6.1.143 → 6.1.168
linux linux_kernel · 6.12.36 → 6.12.81
linux linux_kernel · 6.15.5 → 6.18.22
linux linux_kernel · 6.19 → 6.19.12
linux linux_kernel · 6.6.96 → 6.6.134

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References