KVM: arm64: GICv2: Don't WARN on out-of-range GICV_DIR INTID

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Summary

CVECVE-2026-89727
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:20:03 UTC
Updated2026-10-19 09:18:14 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: KVM: arm64: GICv2: Don't WARN on out-of-range GICV_DIR INTID vgic_v2_deactivate() passes the INTID a guest wrote to GICV_DIR straight to vgic_get_vcpu_irq(), and treats a failed lookup as a "can't happen" condition with WARN_ON_ONCE(). The guest can make it happen at will, though: for any INTID outside of the implemented SGI, PPI and SPI ranges the lookup returns NULL, since GICv2 has no LPIs. A guest running with EOImode==1 writing such an INTID to GICV_DIR triggers the WARN, and panics hosts running with panic_on_warn. Drop the WARN and ignore failed lookups.

Risk And Classification

EPSS: 0.001550000 probability, percentile 0.050070000 (date 2026-09-14)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 255de897e7fb918a34845167c572b5bf8e1d9d79 78b95c571d021391153a5ac7981e9e4d5cc856a3 git Not specified
CNA Linux Linux affected 255de897e7fb918a34845167c572b5bf8e1d9d79 c6d9c8ac6521d3049ec90ac58bebd23ed03ac496 git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/78b95c571d021391153a5ac7981e9e4d5cc856a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c6d9c8ac6521d3049ec90ac58bebd23ed03ac496 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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