---
id: CVE-2026-53098
title: 'wifi: mt76: mt7915: fix use-after-free bugs in mt7915_mac_dump_work()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7915: fix use-after-free bugs in mt7915_mac_dump_work()

  When the mt7915 pci chip is detaching, the mt7915_crash_data is
  released in mt7915_coredump_unreg…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4bf3f4755611e3ae4cca58469e3c1d73be9c8093 <
    55159f1fa30bef03e01af469823c1de103a4a884
  - >-
    Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 <
    6d5202409467d621b6d1dfd7fc7dadb997fe66d2
  - >-
    Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 <
    e6856af8a22a8e2cd18241a465ed00c2301b3a5e
  - >-
    Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 <
    6b7cbb13c838cf2a5f2e7be0e96fe15250087939
  - >-
    Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 <
    21ce6d867867645fff0ef657be18f61d9f39dcd8
  - >-
    Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 <
    1146d0946b5358fad24812bd39d68f31cd40cc34
  - Linux 6.2
published: '2026-06-24'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T11:58:31.148Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-53098'
references:
  - url: 'https://git.kernel.org/stable/c/55159f1fa30bef03e01af469823c1de103a4a884'
  - url: 'https://git.kernel.org/stable/c/6d5202409467d621b6d1dfd7fc7dadb997fe66d2'
  - url: 'https://git.kernel.org/stable/c/e6856af8a22a8e2cd18241a465ed00c2301b3a5e'
  - url: 'https://git.kernel.org/stable/c/6b7cbb13c838cf2a5f2e7be0e96fe15250087939'
  - url: 'https://git.kernel.org/stable/c/21ce6d867867645fff0ef657be18f61d9f39dcd8'
  - url: 'https://git.kernel.org/stable/c/1146d0946b5358fad24812bd39d68f31cd40cc34'
tags:
  - cve.org
epss: 0.00171
epssPercentile: 0.0574
ingestedAt: '2026-09-14T15:23:07.457Z'
---

## Overview

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

wifi: mt76: mt7915: fix use-after-free bugs in mt7915_mac_dump_work()

When the mt7915 pci chip is detaching, the mt7915_crash_data is
released in mt7915_coredump_unregister(). However, the work item
dump_work may still be running or pending, leading to UAF bugs
when the already freed crash_data is dereferenced again in
mt7915_mac_dump_work().

The race condition can occur as follows:

CPU 0 (removal path)               | CPU 1 (workqueue)
mt7915_pci_remove()                | mt7915_sys_recovery_set()
 mt7915_unregister_device()        |  mt7915_reset()
  mt7915_coredump_unregister()     |   queue_work()
   vfree(dev->coredump.crash_data) | mt7915_mac_dump_work()
                                   |  crash_data-> // UAF

Fix this by ensuring dump_work is properly canceled before
the crash_data is deallocated. Add cancel_work_sync() in
mt7915_unregister_device() to synchronize with any pending
or executing dump work.

## Affected

- `Linux >= 4bf3f4755611e3ae4cca58469e3c1d73be9c8093 < 55159f1fa30bef03e01af469823c1de103a4a884`
- `Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 < 6d5202409467d621b6d1dfd7fc7dadb997fe66d2`
- `Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 < e6856af8a22a8e2cd18241a465ed00c2301b3a5e`
- `Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 < 6b7cbb13c838cf2a5f2e7be0e96fe15250087939`
- `Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 < 21ce6d867867645fff0ef657be18f61d9f39dcd8`
- `Linux >= 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 < 1146d0946b5358fad24812bd39d68f31cd40cc34`
- `Linux 6.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.