{"id":"CVE-2021-32847","details":"HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior, a malicious guest can trigger a vulnerability in the host by abusing the disk driver that may lead to the disclosure of the host memory into the virtualized guest. This issue is fixed in commit cf60095a4d8c3cb2e182a14415467afd356e982f.","modified":"2026-04-11T17:25:59.871007Z","published":"2023-02-20T17:15:11.857Z","references":[{"type":"FIX","url":"https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f"},{"type":"EVIDENCE","url":"https://github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316"},{"type":"EVIDENCE","url":"https://securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/moby/hyperkit","events":[{"introduced":"0"},{"last_affected":"40cbd5caa9580e2b6de8fef53f4581943c430312"},{"fixed":"cf60095a4d8c3cb2e182a14415467afd356e982f"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"0.20210107"}]}}],"versions":["v0.20170214","v0.20170227","v0.20170425","v0.20170511","v0.20170519","v0.20170904","v0.20171020","v0.20171204","v0.20180621","v0.20190201","v0.20190802","v0.20200224","v0.20200908","v0.20210107"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32847.json","vanir_signatures":[{"source":"https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f","id":"CVE-2021-32847-33a2ab3c","target":{"file":"src/lib/pci_virtio_block.c","function":"pci_vtblk_proc"},"signature_version":"v1","digest":{"function_hash":"211594263407013010728782976838174057249","length":2203},"deprecated":false,"signature_type":"Function"},{"source":"https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f","id":"CVE-2021-32847-ae3a0f92","target":{"file":"src/lib/pci_virtio_block.c"},"signature_version":"v1","digest":{"line_hashes":["66336624619954675223392690425040697295","9047546862656464640058411706248649179","10498610056149185165050029727385673571","85107401001624865239215709652180088083"],"threshold":0.9},"deprecated":false,"signature_type":"Line"}],"vanir_signatures_modified":"2026-04-11T17:25:59Z"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"}]}