Vulnerability Description
Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. From version 21.0 to before version 51.2, a guest can cause a use-after-free in the cloud-hypervisor process by submitting two virtio-block descriptor chains that reuse the same head_index while asynchronous block I/O is enabled (e.g. io_uring, aio). When the kernel completes the duplicate operation before the original, the completion path frees a bounce buffer that the kernel is still actively reading from or writing to, corrupting the freed memory. This issue has been patched in versions 51.2 and 52.0.
Related Weaknesses (CWE)
References
- https://github.com/cloud-hypervisor/cloud-hypervisor/commit/1314ac883c641f1045bb
- https://github.com/cloud-hypervisor/cloud-hypervisor/pull/8220
- https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v51.2
- https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v52.0
- https://github.com/cloud-hypervisor/cloud-hypervisor/security/advisories/GHSA-f4
FAQ
What is CVE-2026-45782?
CVE-2026-45782 is a documented vulnerability. Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. From version 21.0 to before version 51.2, a guest can cause a use-after-free in the cloud-hypervisor process by submitting two virtio...
How severe is CVE-2026-45782?
CVSS scoring is not yet available for CVE-2026-45782. Check NVD for updates.
Is there a patch for CVE-2026-45782?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.