CVE-2026-63927 usb: dwc2: Fix use after free in debug code
A use-after-free vulnerability in the Linux kernel's dwc2 USB driver debug code allows attackers to potentially execute arbitrary code or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-63927?
CVE-2026-63927 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
usb: dwc2: Fix use after free in debug code
We're not allowed to dereference "urb" after calling usb_hcd_giveback_urb() so save the urb->status ahead of time.
Weakness: CWE-416
Which versions are affected by CVE-2026-63927?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-63927?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-63927 being exploited?
There is no known exploitation of CVE-2026-63927 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-63927, DEBIAN-CVE-2026-63927, GHSA-fcv3-4h5f-37c2, ROOT-OS-UBUNTU-2204-CVE-2026-63927, UBUNTU-CVE-2026-63927.