CVE-2026-53098

/// Technical 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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References