CVE-2021-20257

描述

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

如何修補 CVE-2021-20257

要修補 CVE-2021-20257,請將受影響套件升級到下列已修補版本。

• —升級至 1:5.2+dfsg-9 或更新版本

CVE-2021-20257 正在被利用嗎?

低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 1:5.2+dfsg-9

CVSS 分數

參考連結(1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-20257