CVE-2026-80699

Service interruption via nested vGIC double-deactivation

Published Aug 28, 2026 · Updated Aug 28, 2026

Improper interrupt deactivation in Linux 6.19 KVM arm64 allows attackers to interrupt guest services on AmpereOne systems. vgic_v3_deactivate physically deactivates an IRQ that nested hardware state has already deactivated, causing the pending state and future delivery to be lost. The failure requires an AmpereOne host running nested KVM and a non-active IRQ that is also the highest-priority pending interrupt.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper interrupt deactivation in Linux 6.19 KVM arm64 allows attackers to interrupt guest services on AmpereOne systems. vgic_v3_deactivate physically deactivates an IRQ that nested hardware state has already deactivated, causing the pending state and future delivery to be lost. The failure requires an AmpereOne host running nested KVM and a non-active IRQ that is also the highest-priority pending interrupt.

The record

CVE
CVE-2026-80699
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.19
  2. Affected versionversion=6dd333c8942b2e5bb5927af843b56ec2857db7c7 <8a570b19b4b16a8a3b5ffa2b332bd5613110b2d8
  3. Affected versionversion=6dd333c8942b2e5bb5927af843b56ec2857db7c7 <f78f08b38a7f121c7d6b3e41002d9de7fd3c9189

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.19; version=6dd333c8942b2e5bb5927af843b56ec2857db7c7 <8a570b19b4b16a8a3b5ffa2b332bd5613110b2d8; version=6dd333c8942b2e5bb5927af843b56ec2857db7c7 <f78f08b38a7f121c7d6b3e41002d9de7fd3c9189

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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