CVE-2023-52840: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - fix use after free in rmi_unregister_function() The put_device() calls rmi_release_function() which frees "fn" so the dereference on the next line "fn->num_of_irqs" is a use after free. Move the put_device() to the end to fix this.

Affected products

• Linux Linux Kernel: from 4.18, before 4.19.299 (fixed in 4.19.299); from 4.20, before 5.4.261 (fixed in 5.4.261); from 5.5, before 5.10.201 (fixed in 5.10.201); from 5.11, before 5.15.139 (fixed in 5.15.139); from 5.16, before 6.1.63 (fixed in 6.1.63); from 6.2, before 6.5.12 (fixed in 6.5.12); …

Published 2024-05-21. Last modified 2026-06-17.