Bug 2135267 (CVE-2022-33747) - CVE-2022-33747 xen: unbounded memory consumption for 2nd-level page tables
Summary: CVE-2022-33747 xen: unbounded memory consumption for 2nd-level page tables
Alias: CVE-2022-33747
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2135268
TreeView+ depends on / blocked
Reported: 2022-10-17 07:21 UTC by Marian Rehak
Modified: 2022-11-29 22:18 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2022-11-29 22:18:26 UTC

Attachments (Terms of Use)

Description Marian Rehak 2022-10-17 07:21:09 UTC
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.



Comment 1 Marian Rehak 2022-10-17 07:21:23 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 2135268]

Comment 2 Product Security DevOps Team 2022-11-29 22:18:25 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

Note You need to log in before you can comment on or make changes to this bug.