CVE-2022-33747

描述

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

如何修補 CVE-2022-33747

要修補 CVE-2022-33747,請將受影響套件升級到下列已修補版本。

• —升級至 4.15.4-r0 或更新版本
• —升級至 4.14.5+86-g1c354767d5-1 或更新版本

CVE-2022-33747 正在被利用嗎?

低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 4.15.4-r0
• from 0, < 4.14.5+86-g1c354767d5-1

CVSS 分數

參考連結(2)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-33747
• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-33747