{"id":"CVE-2021-32847","aliases":["EUVD-2021-19579","GHSA-gpgx-6j76-jh6m"],"status":"published","title":"Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx","description":"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.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00369,"percentile":0.31137,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2023-02-20T00:00:00Z","modified":"2026-10-20T14:05:12Z","products":[{"vendor":"moby","product":"hyperkit"},{"vendor":"mobyproject","product":"hyperkit"}],"references":[{"url":"https://securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit/","tags":["x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316","tags":["x_transferred","Exploit","Product","evidence"]},{"url":"https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f","tags":["x_transferred","Patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32847"},{"url":"https://github.com/advisories/GHSA-gpgx-6j76-jh6m"}],"sources":{"cve":[{"id":"CVE-2021-32847","title":"Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx","description":"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.","status":"published","published":"2023-02-20T00:00:00Z","modified":"2025-03-10T21:09:34.018Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2021-19579","description":"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.","status":"published","published":"2023-02-20T00:00:00Z","modified":"2025-03-10T21:09:34Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T20:53:09.197707Z"}],"ghsa":[{"id":"GHSA-gpgx-6j76-jh6m","title":"HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0...","description":"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.","status":"published","published":"2023-02-20T18:30:16Z","modified":"2023-03-09T05:05:59Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:54:17.697698Z"}],"nvd":[{"id":"CVE-2021-32847","description":"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.","status":"published","published":"2023-02-20T17:15:11.857Z","modified":"2026-06-17T03:53:45.107Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:07:07.323379Z"}],"osv":[{"id":"CVE-2021-32847","description":"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.","status":"published","published":"2023-02-20T17:15:11.857Z","modified":"2026-10-20T14:05:12.354931162Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.793849Z"}]}}