CVE-2021-32846

Katalog CVE

CVSS 7.8 · High EPSS 0,32%

Kerentanan Use of Uninitialized Resource pada mobyproject hyperkit. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

17 Februari 2023

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.8 (High), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-908: Use of Uninitialized Resource
CWE-754: Improper Check for Unusual or Exceptional Conditions

EPSS (30 hari)

0,32% peluang dieksploitasi; lebih tinggi dari 22,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/moby/hyperkit/commit/af5eba2360a7351c08dfd9767d9be863a50ebaba patch
• https://github.com/moby/hyperkit/pull/313 patch
• https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/ advisory pihak ketiga