CVE-2026-89727 is a vulnerability in Linux Kernel
Published on September 11, 2026
KVM: arm64: GICv2: Don't WARN on out-of-range GICV_DIR INTID
In 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.
Products Associated with CVE-2026-89727
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Affected Versions
Linux:- Version 255de897e7fb918a34845167c572b5bf8e1d9d79 and below 78b95c571d021391153a5ac7981e9e4d5cc856a3 is affected.
- Version 255de897e7fb918a34845167c572b5bf8e1d9d79 and below c6d9c8ac6521d3049ec90ac58bebd23ed03ac496 is affected.
- Version 6.19 is affected.
- Before 6.19 is unaffected.
- Version 7.2.4, <= 7.2.* is unaffected.
- Version 7.3-rc1, <= * is unaffected.