CVE-2022-33747

 

Published at: - 11-10-2022 03:15

Last modified: - 17-11-2022 04:15

Total changes: - 5

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

 

Verification logic

 

Reference

• https://xenbits.xenproject.org/xsa/advisory-409.txt
• http://xenbits.xen.org/xsa/advisory-409.html
• [oss-security] 20221011 Xen Security Advisory 409 v3 (CVE-2022-33747) - Arm: unbounded memory consumption for 2nd-level page tables-Mailing List, Patch, Third Party Advisory
• FEDORA-2022-5b594b82ac-
• DSA-5272-
• FEDORA-2022-d80cc73088-
• FEDORA-2022-99af00f60e-

 

Keywords

NVD

 

CVE-2022-33747

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures