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Vulnerability record · CVE-2026-46069 · published 27 May 2026

CVE-2026-46069: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.2% CWE-416 · Use after free Undergoing Analysis
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
24 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-46069), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.