CVE-2022-49098

Medium

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.

Package Linux Kernel
Published 2025-02-26
Last modified 2025-10-14
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 4.19.118, 5.4.35, 5.6.7, 5.7 and later are affected. Fixed in 4.19.238, 5.4.189, 5.10.111, 5.15.34, 5.16.20, 5.17.3, 5.18 and their respective stable series.

Affected from
≥ 4.19.118 ≥ 5.4.35 ≥ 5.6.7 ≥ 5.7
Fixed in
✓ 4.19.238 4.19.x ✓ 5.4.189 5.4.x ✓ 5.10.111 5.10.x ✓ 5.15.34 5.15.x ✓ 5.16.20 5.16.x ✓ 5.17.3 5.17.x ✓ 5.18

References

The following references provide additional information about CVE-2022-49098 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

7 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2022-49098?

    CVE-2022-49098 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 4.19.118 onward and has been patched in 4.19.238, 5.4.189, 5.10.111 and others. CVE-2022-49098 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2022-49098?

    CVE-2022-49098 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2022-49098?

    Yes — CVE-2022-49098 has been patched. Fixed versions include 4.19.238, 5.4.189, 5.10.111 and others. If you are running Linux kernel 4.19.118 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2022-49098 actively exploited?

    No — CVE-2022-49098 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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