CVE-2026-64106

Host disclosure and interruption via oversized ITS scan

Published Jul 19, 2026 · Updated Jul 19, 2026

Improper bounds validation in Linux Kernel KVM for arm64 allows local users to disclose host data and interrupt service via restored ITS state. vgic_its_restore_dte() accepts a restored Device Table Entry with excessive EventID bits and passes the unchecked value into an oversized scan_its_table() range. Reachability requires local userspace control of KVM device-state restoration on an arm64 host; the scan can cross the guest boundary and expose memory or exhaust host resources.

CVSS severity9.0
Critical
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper bounds validation in Linux Kernel KVM for arm64 allows local users to disclose host data and interrupt service via restored ITS state. vgic_its_restore_dte() accepts a restored Device Table Entry with excessive EventID bits and passes the unchecked value into an oversized scan_its_table() range. Reachability requires local userspace control of KVM device-state restoration on an arm64 host; the scan can cross the guest boundary and expose memory or exhaust host resources.

The record

CVE
CVE-2026-64106
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.12
  2. Affected versionversion=57a9a117154c93539e33161dd318e6aeb8c04efa <0680f511926589206f81f57f76ce131d7741a316
  3. Affected versionversion=57a9a117154c93539e33161dd318e6aeb8c04efa <1716b7fea2ead941a0dfac06c4504a3437cdf00d
  4. Affected versionversion=57a9a117154c93539e33161dd318e6aeb8c04efa <8bcd15b690a390241179516af1b6ae49ebfd9d95
  5. Affected versionversion=57a9a117154c93539e33161dd318e6aeb8c04efa <9ce754ed8e7ab4e3999767ce1505f85c449ccb07
  6. Affected versionversion=57a9a117154c93539e33161dd318e6aeb8c04efa <b94538186a3eae3763b8f96dacd610920a865aa7
  7. Affected versionversion=57a9a117154c93539e33161dd318e6aeb8c04efa <dab9f93251b2c86a033de6098d0c73afddd55d4a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.12; version=57a9a117154c93539e33161dd318e6aeb8c04efa <0680f511926589206f81f57f76ce131d7741a316; version=57a9a117154c93539e33161dd318e6aeb8c04efa <1716b7fea2ead941a0dfac06c4504a3437cdf00d; version=57a9a117154c93539e33161dd318e6aeb8c04efa <8bcd15b690a390241179516af1b6ae49ebfd9d95; version=57a9a117154c93539e33161dd318e6aeb8c04efa <9ce754ed8e7ab4e3999767ce1505f85c449ccb07; version=57a9a117154c93539e33161dd318e6aeb8c04efa <b94538186a3eae3763b8f96dacd610920a865aa7; version=57a9a117154c93539e33161dd318e6aeb8c04efa <dab9f93251b2c86a033de6098d0c73afddd55d4a

Published CVSS scores

9.0LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo