CVE-2022-49098

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.

The following products are affected by CVE-2022-49098 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2022-49098.

URL	Resource
https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892
https://git.kernel.org/stable/c/3d0078f8bddd58d9bb1ad40bbe929f8633abb276
https://git.kernel.org/stable/c/5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2
https://git.kernel.org/stable/c/6b4c0149a56147b29169e07000d566162892722a
https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8
https://git.kernel.org/stable/c/cf580d2e3884dbafd6b90269b03a24d661578624
https://git.kernel.org/stable/c/dcd6b1a624c0ffa21034d8b1e02e9d068458f596
https://lore.kernel.org/linux-cve-announce/2025022600-CVE-2022-49098-9755@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-49098
https://www.cve.org/CVERecord?id=CVE-2022-49098