Bug 2124911 (CVE-2022-35414)

Summary:	CVE-2022-35414 QEMU: cputlb: uninitialized read during address translation leads to a crash
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	berrange, cfergeau, crobinso, ddepaula, eglynn, jen, jferlan, jjoyce, jmaloy, knoel, lhh, lkundrak, mburns, mcascell, mgarciac, mkenneth, mrezanin, mst, ondrejj, pbonzini, philmd, rjones, spower, virt-maint, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-11-25 06:54:37 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2105986

Description Mauro Matteo Cascella 2022-09-07 12:51:48 UTC

An uninitialized local variable in cputlb tlb_set_page_with_attrs causes a SIGSEGV in io_readx/io_writex via address_space_translate_for_iotlb when a CPU accesses an unmapped IOMMU via memory_region_register_iommu_notifier.

Upstream issue:
https://gitlab.com/qemu-project/qemu/-/issues/1065

Upstream fix:
https://github.com/qemu/qemu/commit/418ade7849ce7641c0f7333718caf5091a02fd4c

Comment 1 Mauro Matteo Cascella 2022-09-07 13:01:57 UTC

According to https://www.qemu.org/docs/master/system/security.html#non-virtualization-use-case, bugs affecting the Tiny Code Generator (TCG) are not considered security bugs at this time. As a result, Red Hat Product Security does not consider this bug to be a security issue.

Comment 2 Product Security DevOps Team 2022-11-25 06:54:34 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-35414