Bug 2482555 (CVE-2026-46131) - CVE-2026-46131 kernel: KVM: x86: check for nEPT/nNPT in slow flush hypercalls
Summary: CVE-2026-46131 kernel: KVM: x86: check for nEPT/nNPT in slow flush hypercalls
Keywords:
Status: NEW
Alias: CVE-2026-46131
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-28 11:03 UTC by OSIDB Bzimport
Modified: 2026-05-28 17:37 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-05-28 11:03:05 UTC 
In the Linux kernel, the following vulnerability has been resolved:

KVM: x86: check for nEPT/nNPT in slow flush hypercalls

Checking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa()
is only valid if an L2 guest is running *with nested EPT/NPT enabled*.
Instead use the same condition as translate_nested_gpa() itself.
Comment 1 Keith Grant 2026-05-28 17:32:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052817-CVE-2026-46131-da6e@gregkh/T
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