CVE-2022-49098 (GCVE-0-2022-49098)
Vulnerability from cvelistv5
Published
2025-02-26 01:54
Modified
2025-05-04 12:44
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 5e059fc0f054309036d3f612bc8b0a502ca58545 Version: 9f38f7b46de0747c1909e8c557aa21715dce20c5 Version: 74347a99e73ae00b8385f1209aaea193c670f901 Version: 74347a99e73ae00b8385f1209aaea193c670f901 Version: 74347a99e73ae00b8385f1209aaea193c670f901 Version: 74347a99e73ae00b8385f1209aaea193c670f901 Version: 74347a99e73ae00b8385f1209aaea193c670f901 Version: caeeb3787167c884b955404a7e669fd77f267e44 |
||||||
|
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{
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{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
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{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
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},
{
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{
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"version": "5.16.20",
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{
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"status": "unaffected",
"version": "5.17.3",
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{
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],
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"descriptions": [
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"value": "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."
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T12:44:17.900Z",
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"url": "https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892"
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{
"url": "https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8"
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"title": "Drivers: hv: vmbus: Fix potential crash on module unload",
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"datePublished": "2025-02-26T01:54:50.073Z",
"dateReserved": "2025-02-26T01:49:39.250Z",
"dateUpdated": "2025-05-04T12:44:17.900Z",
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