CVE-2023-4134: Kernel: cyttsp4_core: use-after-free in cyttsp4_watchdog_work()

Severity: medium (CVSS 5.5 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: 2024-11-14 · updated 2026-06-17
Weakness: CWE-416

Description

A use-after-free vulnerability was found in the cyttsp4_core driver in the Linux kernel. This issue occurs in the device cleanup routine due to a possible rearming of the watchdog_timer from the workqueue. This could allow a local user to crash the system, causing a denial of service.

Affected products

Fedoraproject Fedora: 38
Linux kernel: before 6.5 — fixed in 6.5

How to fix

Upgrade to a fixed version: Linux kernel 6.5. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2023-4134
https://bugzilla.redhat.com/show_bug.cgi?id=2221700

Get alerted when CVE-2023-4134 or the next vulnerability affects your stack