CVE-2021-28692

Katalog CVE

CVSS 7.1 · High EPSS 0,29%

Kerentanan Improper Privilege Management pada xen. Skor CVSS 3.1 7.1 (High) menurut NVD.

Deskripsi (NVD)

inappropriate x86 IOMMU timeout detection / handling IOMMUs process commands issued to them in parallel with the operation of the CPU(s) issuing such commands. In the current implementation in Xen, asynchronous notification of the completion of such commands is not used. Instead, the issuing CPU spin-waits for the completion of the most recently issued command(s). Some of these waiting loops try to apply a timeout to fail overly-slow commands. The course of action upon a perceived timeout actually being detected is inappropriate: - on Intel hardware guests which did not originally cause the timeout may be marked as crashed, - on AMD hardware higher layer callers would not be notified of the issue, making them continue as if the IOMMU operation succeeded.

Rincian

Terbit di NVD

30 Juni 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-269: Improper Privilege Management

EPSS (30 hari)

0,29% peluang dieksploitasi; lebih tinggi dari 19,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://xenbits.xenproject.org/xsa/advisory-373.txt advisory vendor
• https://security.gentoo.org/glsa/202107-30 mitigasi · advisory pihak ketiga