What’s Vulnerable › Vulnerabilities

CVE-2022-49054: Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-08-04

Description

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().

Affected products

• Linux kernel: before 5.15.35; from 5.16 before 5.17.4; 5.18-rc1 — fixed in 5.15.35, 5.17.4

How to fix

Upgrade to a fixed version: Linux kernel 5.15.35, 5.17.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1b576e81d31b56b248316b8ff816b1cc5c4407c7
• https://git.kernel.org/stable/c/6230bc50d6d21cae4c084766623d0a6d17958721
• https://git.kernel.org/stable/c/9f8b577f7b43b2170628d6c537252785dcc2dcea

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