CVE-2026-89727: Linux vulnerability

CVE-2026-89727: 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.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 19, 2026, 08:51 UTC (UTC+00:00)

Potential ATT&CK relevance

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CVE-2026-89727 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 11, 2026, 19:46 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

3Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Sep 11, 2026, 19:38 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Sep 11, 2026, 19:46 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 19, 2026, 08:51 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/78b95c571d021391153a5ac7981e9e4d5cc856a3CVE reference, Linux
https://git.kernel.org/stable/c/c6d9c8ac6521d3049ec90ac58bebd23ed03ac496CVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinux255de897e7fb918a34845167c572b5bf8e1d9d79, 255de897e7fb918a34845167c572b5bf8e1d9d79unaffected

LinuxLinux6.19, 0, 7.2.4, 7.3affected

Weakness

CWE details

No CWE listed

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