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Cloud Hypervisor bug bounty programs

cloudhypervisor.org Updated

Cloud Hypervisor runs one public program: a Sorona bug bounty paying up to $1,500.

Top reward
$1,500
Sorona
Programs
1
1 pays cash
Targets in scope
13
2 types
Last change
None yet
Tracked since Nov 2026

Where to report

The one public program Cloud Hypervisor runs.

  • Cloud Hypervisor

    Sorona · Bug bounty

    Open

    Top reward

    $1,500
    Critical
    –
    High
    –
    Medium
    –
    Low
    $100
    Safe harbor
    Partial

Amounts are the top reward per severity in the currency each program pays. First response is the platform's measured average when it publishes one, else what the policy promises.

What is in scope

13 targets. 5 excluded.

  • https://www.cloudhypervisor.org

    Web

  • ACPI tables, firmware loading and the PCI configuration space presented to the guest

    Products and areas

  • Device hotplug and VFIO passthrough handling

    Products and areas

  • Disk image handling for QCOW, VHDX and raw formats, including backing-file resolution and every field parsed out of an image header

    Products and areas

  • Guest memory management, the KVM and MSHV hypervisor abstraction layers, and the shared memory regions between them

    Products and areas

  • The HTTP API and its socket, plus the D-Bus API, covering every action a control plane can request

    Products and areas

  • The migration path, including the state a destination instance accepts from a source it does not control

    Products and areas

  • The seccomp filter set confining each Cloud Hypervisor worker thread

    Products and areas

  • The security policy accepts reports through GitHub Security Advisories and points at a published threat model that defines what counts as a vulnerability, including a presumption that memory corruption is exploitable until proven otherwise. No component of the VMM is carved out

    Products and areas

  • The virtio device model in full: block, net, balloon, vsock, fs, iommu, rng and console, along with the transports beneath them

    Products and areas

  • vhost-user backends as Cloud Hypervisor drives them, including the socket protocol between the two sides

    Products and areas

  • virtio-fs and virtio-vsock, the two paths that bridge host resources into a guest by design

    Products and areas

  • VM lifecycle operations: boot, pause, resume, snapshot, restore and live migration

    Products and areas

No target matches. Try part of a host name, such as the company name.

Out of scope 5

Don't test these. A program can exclude a host another program covers; the program you report to decides.

  • Defects in KVM, MSHV or the host kernel rather than in Cloud Hypervisor's use of them

  • Denial of service that depends on an operator deliberately removing resource limits

  • Guest kernel and guest firmware defects

  • Issues already covered by a published advisory or under an active embargo

  • rust-vmm crates consumed as dependencies, unless the integration in this repository is what makes the bug reachable

Recent changes

Reward and scope changes across every Cloud Hypervisor program, newest first.

No changes recorded yet. New targets and reward moves show up here and in the RSS feed.

Recent CVEs

Published vulnerabilities in Cloud Hypervisor products, from the NVD.

Search NVD
  • CVE-2026-27211 Critical

    Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. Versions 34.0 through 50.0 arevulnerable to arbitrary host file exfiltration (constrained by process privileges) when using virtio-block devices backed by raw images. A malicious guest can overwrite its disk header with a crafted QCOW2 structure pointing to a sensitive host path. Upon the next VM boot or disk scan, the image format

  • CVE-2023-30612 Medium

    Cloud hypervisor is a Virtual Machine Monitor for Cloud workloads. This vulnerability allows users to close arbitrary open file descriptors in the Cloud Hypervisor process via sending malicious HTTP request through the HTTP API socket. As a result, the Cloud Hypervisor process can be easily crashed, causing Deny-of-Service (DoS). This can also be a potential Use-After-Free (UAF) vulnerability. Use

About this page

This page gathers every public program listed under cloudhypervisor.org: platform programs, self-hosted policies and security.txt contacts. Each program's own policy decides what is in scope and what it pays; check it before you test.

Something wrong or missing? Report a correction.