CVE-2026-45782
Published: Wed, 10 Jun 2026 00:16
Summary
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
Details
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.
Are YOU affected by CVE-2026-45782?
5-second check on your actual server. Reads /etc/os-release, uname -r, and dpkg-query; matches against the live USN + Debian Security Tracker feeds; tells you whether CVE-2026-45782 (and any other live CVE) applies. Anonymous, no signup.
curl https://mindsparkstack.com/scan.sh | bash
References
- https://github.com/cloud-hypervisor/cloud-hypervisor/commit/1314ac883c641f1045bbb06dec0de045a3894baa
- 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-f47p-p25q-83rh
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