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.
Does this matter?
Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.25% probability · 17th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892Patch
- https://git.kernel.org/stable/c/3d0078f8bddd58d9bb1ad40bbe929f8633abb276Patch
- https://git.kernel.org/stable/c/5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2Patch
- https://git.kernel.org/stable/c/6b4c0149a56147b29169e07000d566162892722aPatch
- https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8Patch
- https://git.kernel.org/stable/c/cf580d2e3884dbafd6b90269b03a24d661578624Patch
- https://git.kernel.org/stable/c/dcd6b1a624c0ffa21034d8b1e02e9d068458f596Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.