ghsa-h5qq-53rf-vmjc
Vulnerability from github
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": [],
"aliases": [
"CVE-2022-49098"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:00:47Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Fix potential crash on module unload\n\nThe vmbus driver relies on the panic notifier infrastructure to perform\nsome operations when a panic event is detected. Since vmbus can be built\nas module, it is required that the driver handles both registering and\nunregistering such panic notifier callback.\n\nAfter commit 74347a99e73a (\"x86/Hyper-V: Unload vmbus channel in hv panic callback\")\nthough, the panic notifier registration is done unconditionally in the module\ninitialization routine whereas the unregistering procedure is conditionally\nguarded and executes only if HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE capability\nis set.\n\nThis patch fixes that by unconditionally unregistering the panic notifier\nin the module\u0027s exit routine as well.",
"id": "GHSA-h5qq-53rf-vmjc",
"modified": "2025-10-14T21:30:25Z",
"published": "2025-10-14T21:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49098"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3d0078f8bddd58d9bb1ad40bbe929f8633abb276"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6b4c0149a56147b29169e07000d566162892722a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cf580d2e3884dbafd6b90269b03a24d661578624"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dcd6b1a624c0ffa21034d8b1e02e9d068458f596"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.