CVE-2021-4145

描述

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.

如何修補 CVE-2021-4145

要修補 CVE-2021-4145,請將受影響套件升級到下列已修補版本。

• —升級至 1:6.2+dfsg-1 或更新版本

CVE-2021-4145 正在被利用嗎?

低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 1:6.2+dfsg-1

CVSS 分數

參考連結(1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-4145