Bug 2135262 (CVE-2022-33748) - CVE-2022-33748 xen: lock order inversion in transitive grant copy handling
Summary: CVE-2022-33748 xen: lock order inversion in transitive grant copy handling
Alias: CVE-2022-33748
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2135263
TreeView+ depends on / blocked
Reported: 2022-10-17 07:17 UTC by Marian Rehak
Modified: 2022-11-29 20:58 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2022-11-29 20:58:02 UTC

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Description Marian Rehak 2022-10-17 07:17:34 UTC
Lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.



Comment 1 Marian Rehak 2022-10-17 07:17:48 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 2135263]

Comment 2 Product Security DevOps Team 2022-11-29 20:58:01 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.

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