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Vulnerability DatabaseCVE-2022-49774
CVE-2022-49774:
Linux Kernel vulnerability analysis and mitigation
Overview
A vulnerability (CVE-2022-49774) was identified in the Linux kernel's KVM x86/xen subsystem, specifically related to improper error handling in the kvm_xen_eventfd_assign() function. The issue was discovered and disclosed on May 1, 2025, affecting Linux kernel systems with KVM virtualization enabled (NVD).
Technical details
The vulnerability stems from incorrect error handling in the KVM (Kernel-based Virtual Machine) subsystem where eventfd_ctx_put() was erroneously called during error conditions in the kvm_xen_eventfd_assign() function. The fix involved introducing a new goto target to handle the error case properly (Wiz).
Impact
The vulnerability could potentially lead to system instability or resource leaks in virtualized environments using KVM with Xen virtualization enabled (Wiz).
Mitigation and workarounds
The vulnerability has been patched in the Linux kernel. System administrators are advised to update to a kernel version that includes the fix. The solution implements a modification to the error handling logic in the kvm_xen_eventfd_assign() function (Wiz).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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