CVE-2026-64349 usb: dwc3: fix dwc3_readl() and dwc3_writel() calls in dwc3_ulpi_setup()
Fixes incorrect argument types in DWC3 USB driver register access functions, resolving sparse warnings and potential bugs in ULPI setup.
- 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-2026-64349?
CVE-2026-64349 is a medium-severity vulnerability in Linux kernel, published on 25 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: dwc3: fix dwc3_readl() and dwc3_writel() calls in dwc3_ulpi_setup()
The dwc3_ulpi_setup() calls the register read and write calls with dwc3->regs when both these calls take the dwc3 structure directly.
Chnage these two calls to fix the following sparse warning, and possibly a nasty bug in the dwc3_ulpi_setup() code:
drivers/usb/dwc3/core.c:796:45: warning: incorrect type in argument 1 (different address spaces) drivers/usb/dwc3/core.c:796:45: expected struct dwc3 *dwc drivers/usb/dwc3/core.c:796:45: got void [noderef] __iomem *regs drivers/usb/dwc3/core.c:798:40: warning: incorrect type in argument 1 (different address spaces) drivers/usb/dwc3/core.c:798:40: expected struct dwc3 *dwc drivers/usb/dwc3/core.c:798:40: got void [noderef] __iomem *regs
Which versions are affected by CVE-2026-64349?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64349?
Apply the vendor's patch.
Is CVE-2026-64349 being exploited?
There is no known exploitation of CVE-2026-64349 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64349, DEBIAN-CVE-2026-64349, GHSA-5378-7cc2-8x2v, ROOT-OS-UBUNTU-2204-CVE-2026-64349, UBUNTU-CVE-2026-64349.