CVE-2022-33747

Name: CVE-2022-33747
Creator: NVD / NIST
Published: 2022-10-11T13:15:10.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.8/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2022-33747 is a low-severity vulnerability rated 3.8/10 on the CVSS scale. 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. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.8/10

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

EPSS Probability

0.26%

17.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-404

Affected Software

Vendor	Product	Versions
Xen	Xen	All versions
Fedoraproject	Fedora	35
Fedoraproject	Fedora	36
Fedoraproject	Fedora	37
Debian	Debian Linux	11.0

References

http://www.openwall.com/lists/oss-security/2022/10/11/5Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-409.htmlPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TJOMUNGW6VTK5CZZRLWLVVEOUPEQBRHI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWSC77GS5NATI3TT7FMVPULUPXR635XQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
https://security.gentoo.org/glsa/202402-07
https://www.debian.org/security/2022/dsa-5272Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-409.txtPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/10/11/5Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-409.htmlPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TJOMUNGW6VTK5CZZRLWLVVEOUPEQBRHI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWSC77GS5NATI3TT7FMVPULUPXR635XQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
https://security.gentoo.org/glsa/202402-07
https://www.debian.org/security/2022/dsa-5272Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-409.txtPatch, Vendor Advisory

Timeline

Published: Oct 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33747?

How severe is CVE-2022-33747?

CVE-2022-33747 has a CVSS score of 3.8/10 (LOW severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33747?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-33747?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST