CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.0%
In the Linux kernel, the following vulnerability has been resolved:
usb: dwc3: core: remove lock of otg mode during gadget suspend/resume to avoid deadlock
When config CONFIG_USB_DWC3_DUAL_ROLE is selected, and trigger system
to enter suspend status with below command:
echo mem > /sys/power/state
There will be a deadlock issue occurring. Detailed invoking path as
below:
dwc3_suspend_common()
spin_lock_irqsave(&dwc->lock, flags); <– 1st
dwc3_gadget_suspend(dwc);
dwc3_gadget_soft_disconnect(dwc);
spin_lock_irqsave(&dwc->lock, flags); <– 2nd
This issue is exposed by commit c7ebd8149ee5 (“usb: dwc3: gadget: Fix
NULL pointer dereference in dwc3_gadget_suspend”) that removes the code
of checking whether dwc->gadget_driver is NULL or not. It causes the
following code is executed and deadlock occurs when trying to get the
spinlock. In fact, the root cause is the commit 5265397f9442(“usb: dwc3:
Remove DWC3 locking during gadget suspend/resume”) that forgot to remove
the lock of otg mode. So, remove the redundant lock of otg mode during
gadget suspend/resume.
git.kernel.org/stable/c/17e2956633ca560b95f1cbbb297cfc2adf650649
git.kernel.org/stable/c/7026576e89094aa9a0062aa6d10cba18aa99944c
git.kernel.org/stable/c/7838de15bb700c2898a7d741db9b1f3cbc86c136
git.kernel.org/stable/c/d77e2b5104c51d3668b9717c825a4a06998efe63
git.kernel.org/stable/c/f1274cfab183e69a7c7bafffcb4f50703c876276
security-tracker.debian.org/tracker/CVE-2024-42085