CVE-2025-37990 wifi: brcm80211: fmac: Add error handling for brcmf_usb_dl_writeimage()
A missing error check in the Broadcom Wi-Fi USB driver allows uninitialized variables to be used, potentially causing a kernel crash or 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
- Available
What is CVE-2025-37990?
CVE-2025-37990 is a medium-severity vulnerability in Debian Debian Linux, published on 20 May 2025. 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:
wifi: brcm80211: fmac: Add error handling for brcmf_usb_dl_writeimage()
The function brcmf_usb_dl_writeimage() calls the function brcmf_usb_dl_cmd() but dose not check its return value. The 'state.state' and the 'state.bytes' are uninitialized if the function brcmf_usb_dl_cmd() fails. It is dangerous to use uninitialized variables in the conditions.
Add error handling for brcmf_usb_dl_cmd() to jump to error handling path if the brcmf_usb_dl_cmd() fails and the 'state.state' and the 'state.bytes' are uninitialized.
Improve the error message to report more detailed error information.
Weakness: CWE-908
Which versions are affected by CVE-2025-37990?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-37990?
Apply the vendor's patch.
Is CVE-2025-37990 being exploited?
There is no known exploitation of CVE-2025-37990 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-37990, DEBIAN-CVE-2025-37990, GHSA-fhrm-6xxc-qc49, ROOT-OS-DEBIAN-11-CVE-2025-37990, ROOT-OS-DEBIAN-12-CVE-2025-37990, ROOT-OS-UBUNTU-2204-CVE-2025-37990 and 2 more.