CVE-2023-52445: 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: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack.

Affected products

• Linux Linux Kernel: before 4.19.306 (fixed in 4.19.306); from 4.20, before 5.4.268 (fixed in 5.4.268); from 5.5.0, before 5.10.209 (fixed in 5.10.209); from 5.11.0, before 5.15.148 (fixed in 5.15.148); from 5.16.0, before 6.1.75 (fixed in 6.1.75); from 6.2.0, before 6.6.14 (fixed in 6.6.14); …

Published 2024-02-22. Last modified 2026-06-17.