CVE-2022-42333

Published: 21 March 2023

x86/HVM pinned cache attributes mis-handling T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To allow cachability control for HVM guests with passed through devices, an interface exists to explicitly override defaults which would otherwise be put in place. While not exposed to the affected guests themselves, the interface specifically exists for domains controlling such guests. This interface may therefore be used by not fully privileged entities, e.g. qemu running deprivileged in Dom0 or qemu running in a so called stub-domain. With this exposure it is an issue that - the number of the such controlled regions was unbounded (CVE-2022-42333), - installation and removal of such regions was not properly serialized (CVE-2022-42334).

Notes

hypervisor packages are in universe. For
issues in the hypervisor, add appropriate
tags to each section, ex:
Tags_xen: universe-binary

Status

Severity score breakdown

References

• https://www.openwall.com/lists/oss-security/2023/03/21/2
• https://xenbits.xen.org/xsa/advisory-428.html
• https://xenbits.xenproject.org/xsa/advisory-428.txt
• http://xenbits.xen.org/xsa/advisory-428.html
• http://www.openwall.com/lists/oss-security/2023/03/21/2
• https://www.cve.org/CVERecord?id=CVE-2022-42333
• NVD
• Launchpad
• Debian

Bugs

• http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1033297