CVE-2026-46069

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.

References

Other References

https://git.kernel.org/stable/c/030abbae49cf9fd1fba7aa08e15ec81efbeb78cf https://git.kernel.org/stable/c/11869ce402d95519d49b25a2a97741f68d69d103 https://git.kernel.org/stable/c/4e179a60a60c0a5aea245e8e67768343c0f070b8 https://git.kernel.org/stable/c/63fe3389b3e092d6c0eeea9fc0318e7918b16618 https://git.kernel.org/stable/c/ae5e95d4157481693be2317e3ffcd84e36010cbb

Frequently Asked Questions

What is CVE-2026-46069? +

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.

How do I check if I'm vulnerable to CVE-2026-46069? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Description

References

Other References

Frequently Asked Questions

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