wifi: mwifiex: fix use-after-free in mwifiex_adapter_cleanup()

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Summary

CVECVE-2026-46069
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:28 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.050770000 (date 2026-06-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4636187da60b6e33526050235c610409d9cc00e8 11869ce402d95519d49b25a2a97741f68d69d103 git Not specified
CNA Linux Linux affected 4636187da60b6e33526050235c610409d9cc00e8 63fe3389b3e092d6c0eeea9fc0318e7918b16618 git Not specified
CNA Linux Linux affected 4636187da60b6e33526050235c610409d9cc00e8 4e179a60a60c0a5aea245e8e67768343c0f070b8 git Not specified
CNA Linux Linux affected 4636187da60b6e33526050235c610409d9cc00e8 030abbae49cf9fd1fba7aa08e15ec81efbeb78cf git Not specified
CNA Linux Linux affected 4636187da60b6e33526050235c610409d9cc00e8 ae5e95d4157481693be2317e3ffcd84e36010cbb git Not specified
CNA Linux Linux affected 4.0 Not specified
CNA Linux Linux unaffected 4.0 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4e179a60a60c0a5aea245e8e67768343c0f070b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae5e95d4157481693be2317e3ffcd84e36010cbb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/63fe3389b3e092d6c0eeea9fc0318e7918b16618 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/11869ce402d95519d49b25a2a97741f68d69d103 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/030abbae49cf9fd1fba7aa08e15ec81efbeb78cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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