HID: winwing: fix use-after-free in force feedback teardown

Summary

In the Linux kernel, the following vulnerability has been resolved: HID: winwing: fix use-after-free in force feedback teardown winwing_init_ff() passes the driver's private data, allocated with devm_kzalloc() in winwing_probe(), as the effect context to input_ff_create_memless(). The memoryless force-feedback core takes ownership of that pointer and frees it with kfree() from input_ff_destroy() (ml_ff_destroy()) when the input device is destroyed. Freeing a devm-managed allocation with kfree() is an invalid free, and the same object is then released again by devres when the HID device is torn down, a double free. As the allocation also embeds the LED class devices, their timers and work item live on freed memory and the slab gets corrupted. This triggers on unbind, rmmod, hot-unplug and on system suspend, where the firmware cache walks the now-corrupt devres list. KASAN reports: BUG: KASAN: invalid-free in input_ff_destroy Allocated by task N: winwing_probe Pass NULL as the memless context instead and fetch the driver data from the input device in winwing_play_effect(): the HID core already stores the hid_device as the input device's drvdata. The force-feedback core then owns nothing that it must not free.

Timeline

1. Oct 18, 2026, 3:20 PM UTCCVE published
2. Oct 19, 2026, 9:23 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 42d020b54edc57d03749bed75976f1e962a9fbfa · fixed in 2b25f11ec52ea0a82334d5b83ee321f6b0a35923; From 42d020b54edc57d03749bed75976f1e962a9fbfa · fixed in a1a5ad37e50ceb192c07ac7e2d7143638cd4d110

• Linux Linux

  7.1

• KernelLinux

  From 7.1.0 · fixed in 7.2.9

References 2