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Unrated severityNVD Advisory· Published Sep 13, 2024· Updated Dec 20, 2025

KVM: arm64: Make ICC_*SGI*_EL1 undef in the absence of a vGICv3

CVE-2024-46707

Description

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

KVM: arm64: Make ICC_*SGI*_EL1 undef in the absence of a vGICv3

On a system with a GICv3, if a guest hasn't been configured with GICv3 and that the host is not capable of GICv2 emulation, a write to any of the ICC_*SGI*_EL1 registers is trapped to EL2.

We therefore try to emulate the SGI access, only to hit a NULL pointer as no private interrupt is allocated (no GIC, remember?).

The obvious fix is to give the guest what it deserves, in the shape of a UNDEF exception.

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Affected products

113

Patches

Vulnerability mechanics

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