# CVE-2023-52475: Input: powermate - fix use-after-free in powermate\_config\_complete

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-02-29 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## 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

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
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## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/8677575c4f39d65bf0d719b5d20e8042e550ccb9
- https://git.kernel.org/stable/c/67cace72606baf1758fd60feb358f4c6be92e1cc
- https://git.kernel.org/stable/c/5aa514100aaf59868d745196258269a16737c7bd
- https://git.kernel.org/stable/c/cd2fbfd8b922b7fdd50732e47d797754ab59cb06
- https://git.kernel.org/stable/c/6a4a396386404e62fb59bc3bde48871a64a82b4f
- https://git.kernel.org/stable/c/2efe67c581a2a6122b328d4bb6f21b3f36f40d46
- https://git.kernel.org/stable/c/e528b1b9d60743e0b26224e3fe7aa74c24b8b2f8
- https://git.kernel.org/stable/c/5c15c60e7be615f05a45cd905093a54b11f461bc

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Page: https://cve.now/CVE-2023-52475
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