CVE-2026-4179 stm32: usb: Infinite while loop in Interrupt Handler
An infinite loop in the Zephyr RTOS STM32 USB driver allows attackers to cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4179?
CVE-2026-4179 is a medium-severity denial of service vulnerability in Zephyrproject Zephyr, published on 14 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Issues in stm32 USB device driver (drivers/usb/device/usb_dc_stm32.c) can lead to an infinite while loop.
Weakness: CWE-835
Which versions are affected by CVE-2026-4179?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2026-4179?
No fix has been published for CVE-2026-4179 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-4179 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4179 exists.
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- CVE-2022-3806 Bluetooth HCI Error Handling Double Free
- CVE-2017-14199 Memory corruption in getaddrinfo
- CVE-2018-1000800 Null dereference in n/a
- CVE-2021-3329 DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer
Sources
Also known as GHSA-9xg7-g3q3-9prf.