HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. 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 af5eba2360a7351c08dfd9767d9be863a50ebaba.
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Mon, 10 Mar 2025 21:15:00 +0000
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-03-10T21:09:47.105Z
Reserved: 2021-05-12T00:00:00.000Z
Link: CVE-2021-32846

Updated: 2024-08-03T23:33:56.113Z

Status : Modified
Published: 2023-02-17T23:15:12.037
Modified: 2024-11-21T06:07:52.353
Link: CVE-2021-32846

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