CVE-2021-32845

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, the implementation of `qnotify` at `pci_vtrnd_notify` fails to check the return value of `vq_getchain`. This leads to `struct iovec iov;` being uninitialized and used to read memory in `len = (int) read(sc->vrsc_fd, iov.iov_base, iov.iov_len);` when an attacker is able to make `vq_getchain` fail. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit 41272a980197917df8e58ff90642d14dec8fe948.

• CWE-908
• CWE-252

• https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948Patch
• https://github.com/moby/hyperkit/pull/313Patch
• https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/Third Party Advisory
• https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948Patch
• https://github.com/moby/hyperkit/pull/313Patch
• https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/Third Party Advisory

Published

Feb 17, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-32839sqlparse is a non-validating SQL parser module for Python. I…7.5
• CVE-2021-32840SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 libra…9.8
• CVE-2021-32841SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 libra…5.3
• CVE-2021-32842SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 libra…5.3
• CVE-2021-32843HyperKit is a toolkit for embedding hypervisor capabilities …5.5
• CVE-2021-32844HyperKit is a toolkit for embedding hypervisor capabilities …5.5
• CVE-2021-32846HyperKit is a toolkit for embedding hypervisor capabilities …7.8
• CVE-2021-32847HyperKit is a toolkit for embedding hypervisor capabilities …6.5
• CVE-2021-32848Octobox is software for managing GitHub notifications. Prior…7.5
• CVE-2021-32849Gerapy is a distributed crawler management framework. Prior …8.8
• CVE-2021-3285jxbrowser in TI Code Composer Studio IDE 8.x through 10.x be…5.3
• CVE-2021-32850jQuery MiniColors is a color picker built on jQuery. Prior t…6.1