IT

Tracker / CVE-2022-49098

CVE-2022-49098

Medium 5.5

In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Fix potential crash on module unload The vmbus driver relies on the panic notifier infrastructure to perform some operations when a panic event is detected. Since vmbus can be built as module, it is required that the driver handles both registering and unregistering such panic notifier callback. After commit 74347a99e73a ("x86/Hyper-V: Unload vmbus channel in hv panic callback") though, the panic notifier registration is done unconditionally in the module initialization routine whereas the unregistering procedure is conditionally guarded and executes only if HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE capability is set. This patch fixes that by unconditionally unregistering the panic notifier in the module's exit routine as well.

Affected products and versions

linux linux_kernel
linux linux_kernel · 4.19.118 → 4.19.238
linux linux_kernel · 5.11 → 5.15.34
linux linux_kernel · 5.16 → 5.16.20
linux linux_kernel · 5.17 → 5.17.3
linux linux_kernel · 5.4.35 → 5.4.189
linux linux_kernel · 5.6.7 → 5.7
linux linux_kernel · 5.7.1 → 5.10.111

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References