CVE-2022-33747
First published: Tue Oct 11 2022(Updated: )
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.
Credit: security@xen.org security@xen.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xen | <=4.11.4+107-gef32c7afa2-1 | 4.14.6-1 4.14.5+94-ge49571868d-1 4.17.1+2-gb773c48e36-1 4.17.2+55-g0b56bed864-1 |
| Xen XAPI | ||
| Fedora | =35 | |
| Fedora | =36 | |
| Fedora | =37 | |
| Debian | =11.0 |
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Reference Links
- https://xenbits.xen.org/xsa/advisory-409.html
- https://security-tracker.debian.org/tracker/CVE-2022-33747
- http://www.openwall.com/lists/oss-security/2022/10/11/5
- http://xenbits.xen.org/xsa/advisory-409.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TJOMUNGW6VTK5CZZRLWLVVEOUPEQBRHI/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWSC77GS5NATI3TT7FMVPULUPXR635XQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
- https://www.debian.org/security/2022/dsa-5272
- https://xenbits.xenproject.org/xsa/advisory-409.txt
- 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/TJOMUNGW6VTK5CZZRLWLVVEOUPEQBRHI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
- https://security.gentoo.org/glsa/202402-07
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2022-33747.
What is the severity of CVE-2022-33747?
The severity of CVE-2022-33747 is low with a severity value of 3.8.
Which software is affected by CVE-2022-33747?
The software affected by CVE-2022-33747 includes Xen Xen, Xen Xen on Arm, Fedoraproject Fedora versions 35, 36, and 37, and Debian Debian Linux version 11.0.
How can I fix CVE-2022-33747?
To fix CVE-2022-33747, update your software to one of the following versions: Xen 4.14.6-1, Xen 4.14.5+94-ge49571868d-1, Xen 4.17.1+2-gb773c48e36-1, Xen 4.17.2+55-g0b56bed864-1.
Where can I find more information about CVE-2022-33747?
You can find more information about CVE-2022-33747 at the following references: [XSA advisory-409](https://xenbits.xen.org/xsa/advisory-409.html), [Debian security tracker](https://security-tracker.debian.org/tracker/CVE-2022-33747), [Openwall mailing list](http://www.openwall.com/lists/oss-security/2022/10/11/5).
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