Bug 2467118 (CVE-2026-43261)

Summary:	CVE-2026-43261 kernel: arm64: Add support for TSV110 Spectre-BHB mitigation
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel. This vulnerability affects systems running on TSV110 processors, making them susceptible to the Spectre-BHB (Branch History Buffer) attack. A local attacker could exploit this side-channel vulnerability to potentially leak sensitive information by observing patterns in branch prediction. This issue can lead to unauthorized disclosure of data.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 13:05:14 UTC

In the Linux kernel, the following vulnerability has been resolved:

arm64: Add support for TSV110 Spectre-BHB mitigation

The TSV110 processor is vulnerable to the Spectre-BHB (Branch History
Buffer) attack, which can be exploited to leak information through
branch prediction side channels. This commit adds the MIDR of TSV110
to the list for software mitigation.

Comment 1 Keith Grant 2026-05-06 23:39:04 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050607-CVE-2026-43261-d70e@gregkh/T