CVE-2022-49054
Description
From CVE.org
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests hv_panic_page might contain guest-sensitive information, do not dump it over to Hyper-V by default in isolated guests. While at it, update some comments in hyperv_{panic,die}_event().
Statement
This vulnerability is rated as Moderate severity because it requires an unhandled kernel crash inside an isolated virtual machine to expose sensitive guest memory to the host hypervisor, limiting the blast radius to confidentiality during failure states. The issue specifically impacts confidential or isolated guest workloads running on Microsoft Hyper-V where panic reporting is enabled. Systems running on bare metal, container environments, or alternative virtualization platforms are not subject to this data leakage.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.1 | 5.5 | 7.1 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Changed |
| Confidentiality | High | None | High |
| Integrity Impact | None | None | None |
| Availability Impact | Low | High | None |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
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