CVE-2026-45782
Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads
Published: 2026-06-10 · Last updated: 2026-06-10
Severity and scoring
- CWE
- CWE-416
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-45782
- [Other]https://github.com/cloud-hypervisor/cloud-hypervisor/commit/1314ac883c641f1045bbb06dec0de045a3894baa
- [Other]https://github.com/cloud-hypervisor/cloud-hypervisor/pull/8220
- [Other]https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v51.2
- [Other]https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v52.0
- [Other]https://github.com/cloud-hypervisor/cloud-hypervisor/security/advisories/GHSA-f47p-p25q-83rh
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