# CVE-2026-53098

## Summary

- **CVE ID:** CVE-2026-53098
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Jun 24, 2026
- **Last Modified:** Sep 17, 2026

## Description

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 Products

- Linux — Linux (4dbcb9125cc3e10a6d879c10e4f5816d05a87c49)
- Linux — Linux (6.2)
- Linux — Linux (0)
- Linux — Linux (6.6.141)
- Linux — Linux (6.12.91)
- Linux — Linux (6.18.33)
- Linux — Linux (7.0.10)
- Linux — Linux (7.1)
- Linux — Linux (4bf3f4755611e3ae4cca58469e3c1d73be9c8093)

## References

- [CNA](https://git.kernel.org/stable/c/6d5202409467d621b6d1dfd7fc7dadb997fe66d2)
- [CNA](https://git.kernel.org/stable/c/e6856af8a22a8e2cd18241a465ed00c2301b3a5e)
- [CNA](https://git.kernel.org/stable/c/6b7cbb13c838cf2a5f2e7be0e96fe15250087939)
- [CNA](https://git.kernel.org/stable/c/21ce6d867867645fff0ef657be18f61d9f39dcd8)
- [CNA](https://git.kernel.org/stable/c/1146d0946b5358fad24812bd39d68f31cd40cc34)
- [CNA](https://git.kernel.org/stable/c/55159f1fa30bef03e01af469823c1de103a4a884)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.13%
- **EPSS Percentile:** 2.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._