CVE-2023-52475: Input: powermate - fix use-after-free in powermate_config_complete

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-29 · updated 2026-06-17
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: Input: powermate - fix use-after-free in powermate_config_complete syzbot has found a use-after-free bug [1] in the powermate driver. This happens when the device is disconnected, which leads to a memory free from the powermate_device struct. When an asynchronous control message completes after the kfree and its callback is invoked, the lock does not exist anymore and hence the bug. Use usb_kill_urb() on pm->config to cancel any in-progress requests upon device disconnection. [1] https://syzkaller.appspot.com/bug?extid=0434ac83f907a1dbdd1e

Affected products

Linux kernel: before 4.14.328; from 4.15 before 4.19.297; from 4.20 before 5.4.259; from 5.5 before 5.10.199; from 5.11 before 5.15.136; from 5.16 before 6.1.59 — fixed in 4.14.328, 4.19.297, 5.10.199, 5.15.136, 5.4.259, 6.1.59

How to fix

Upgrade to a fixed version: Linux kernel 4.14.328, 4.19.297, 5.10.199, 5.15.136. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2023-52475 or the next vulnerability affects your stack