Bug 2482574 (CVE-2026-46171)

Summary:	CVE-2026-46171 kernel: riscv: kvm: fix vector context allocation leak
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for RISC-V architecture. This vulnerability occurs when a second memory allocation fails during the vector context setup, causing a previously allocated memory block to be leaked. Over time, repeated occurrences of this issue could lead to memory exhaustion, potentially impacting system stability and availability.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-28 11:03:58 UTC

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

riscv: kvm: fix vector context allocation leak

When the second kzalloc (host_context.vector.datap) fails in
kvm_riscv_vcpu_alloc_vector_context, the first allocation
(guest_context.vector.datap) is leaked. Free it before returning.

Comment 1 Keith Grant 2026-05-28 15:06:04 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052827-CVE-2026-46171-a668@gregkh/T