CVE-2025-38009

wifi: mt76: disable napi on driver removal

State: Published
Severity: Not scored
Published: Jun 18, 2025
Updated: May 11, 2026
Reserved: Apr 16, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: disable napi on driver removal

A warning on driver removal started occurring after commit 9dd05df8403b ("net: warn if NAPI instance wasn't shut down"). Disable tx napi before deleting it in mt76_dma_cleanup().

WARNING: CPU: 4 PID: 18828 at net/core/dev.c:7288 __netif_napi_del_locked+0xf0/0x100 CPU: 4 UID: 0 PID: 18828 Comm: modprobe Not tainted 6.15.0-rc4 #4 PREEMPT(lazy) Hardware name: ASUS System Product Name/PRIME X670E-PRO WIFI, BIOS 3035 09/05/2024 RIP: 0010:__netif_napi_del_locked+0xf0/0x100 Call Trace: <TASK> mt76_dma_cleanup+0x54/0x2f0 [mt76] mt7921_pci_remove+0xd5/0x190 [mt7921e] pci_device_remove+0x47/0xc0 device_release_driver_internal+0x19e/0x200 driver_detach+0x48/0x90 bus_remove_driver+0x6d/0xf0 pci_unregister_driver+0x2e/0xb0 __do_sys_delete_module.isra.0+0x197/0x2e0 do_syscall_64+0x7b/0x160 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Tested with mt7921e but the same pattern can be actually applied to other mt76 drivers calling mt76_dma_cleanup() during removal. Tx napi is enabled in their *_dma_init() functions and only toggled off and on again inside their suspend/resume/reset paths. So it should be okay to disable tx napi in such a generic way.

Found by Linux Verification Center (linuxtesting.org).

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	2ac515a5d74f26963362d5da9589c67ca3663338 to before ff0f820fa5b99035b3c654dd531226d8d83aec5fAffected 2ac515a5d74f26963362d5da9589c67ca3663338 to before ca5b213bf4b4224335a8131a26805d16503fca5fAffected 2ac515a5d74f26963362d5da9589c67ca3663338 to before b892e830d1ea8c5475254b98827771f7366f1039Affected 2ac515a5d74f26963362d5da9589c67ca3663338 to before 5e700b06b970fc19e3a1ecb244e14785f3fbb8e3Affected 2ac515a5d74f26963362d5da9589c67ca3663338 to before 2b81e76db3667d1f7f2ad44e9835cdaf8dea95a8Affected 2ac515a5d74f26963362d5da9589c67ca3663338 to before e7bfbda5fddd27f3158e723d641c0fcdfb0552a7Affected 2ac515a5d74f26963362d5da9589c67ca3663338 to before 78ab4be549533432d97ea8989d2f00b508fa68d8Affected
LinuxLinux	5.2Affected before 5.2Not affected 5.10.238 through 5.10.Not affected 5.15.184 through 5.15.Not affected 6.1.140 through 6.1.Not affected 6.6.92 through 6.6.Not affected 6.12.30 through 6.12.Not affected 6.14.8 through 6.14.Not affected 6.15 and laterNot affected

Product

Versions

LinuxLinux

2ac515a5d74f26963362d5da9589c67ca3663338 to before ff0f820fa5b99035b3c654dd531226d8d83aec5fAffected
2ac515a5d74f26963362d5da9589c67ca3663338 to before ca5b213bf4b4224335a8131a26805d16503fca5fAffected
2ac515a5d74f26963362d5da9589c67ca3663338 to before b892e830d1ea8c5475254b98827771f7366f1039Affected
2ac515a5d74f26963362d5da9589c67ca3663338 to before 5e700b06b970fc19e3a1ecb244e14785f3fbb8e3Affected
2ac515a5d74f26963362d5da9589c67ca3663338 to before 2b81e76db3667d1f7f2ad44e9835cdaf8dea95a8Affected
2ac515a5d74f26963362d5da9589c67ca3663338 to before e7bfbda5fddd27f3158e723d641c0fcdfb0552a7Affected
2ac515a5d74f26963362d5da9589c67ca3663338 to before 78ab4be549533432d97ea8989d2f00b508fa68d8Affected

LinuxLinux

5.2Affected
before 5.2Not affected
5.10.238 through 5.10.*Not affected
5.15.184 through 5.15.*Not affected
6.1.140 through 6.1.*Not affected
6.6.92 through 6.6.*Not affected
6.12.30 through 6.12.*Not affected
6.14.8 through 6.14.*Not affected
6.15 and laterNot affected

References

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