CVE-2025-37990: wifi: brcm80211: fmac: Add error handling for brcmf_usb_dl_writeimage()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-20 · updated 2026-06-17
Weakness: CWE-908

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.

Affected products

Debian Linux: 11.0
Linux kernel: from 3.4 before 5.4.294; from 5.5 before 5.10.238; from 5.11 before 5.15.182; from 5.16 before 6.1.138; from 6.2 before 6.6.90; from 6.7 before 6.12.28 — fixed in 5.10.238, 5.15.182, 5.4.294, 6.1.138, 6.12.28, 6.14.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.238, 5.15.182, 5.4.294, 6.1.138. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2025-37990 or the next vulnerability affects your stack