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CVE-2026-64106
KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that state, but vgic_its_restore_dte() accepts it and stores the out-of-range value in dev->num_eventid_bits. Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before allocating the device. This mirrors the MAPD check and prevents the restored state from reaching vgic_its_restore_itt(), where the unchecked value can be converted into an oversized scan_its_table() range.

Details
INFO

Published Date :

July 19, 2026, 4:17 p.m.

Last Modified :

July 19, 2026, 4:17 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64106 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
Solution
Update the Linux kernel to fix a vulnerability related to restored DTEs in KVM.
  • Update the Linux kernel.
  • Apply the patch for KVM arm64 vgic-its.
  • Reject restored DTEs with invalid num_eventid_bits.
  • Prevent oversized scan_its_table() ranges.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64106.

URL Resource
https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316
https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d
https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95
https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07
https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7
https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64106 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64106 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64106 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64106 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 19, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '57a9a117154c93539e33161dd318e6aeb8c04efa', 'lessThan': '1716b7fea2ead941a0dfac06c4504a3437cdf00d', 'versionType': 'git'}, {'status': 'affected', 'version': '57a9a117154c93539e33161dd318e6aeb8c04efa', 'lessThan': 'dab9f93251b2c86a033de6098d0c73afddd55d4a', 'versionType': 'git'}, {'status': 'affected', 'version': '57a9a117154c93539e33161dd318e6aeb8c04efa', 'lessThan': 'b94538186a3eae3763b8f96dacd610920a865aa7', 'versionType': 'git'}, {'status': 'affected', 'version': '57a9a117154c93539e33161dd318e6aeb8c04efa', 'lessThan': '0680f511926589206f81f57f76ce131d7741a316', 'versionType': 'git'}, {'status': 'affected', 'version': '57a9a117154c93539e33161dd318e6aeb8c04efa', 'lessThan': '8bcd15b690a390241179516af1b6ae49ebfd9d95', 'versionType': 'git'}, {'status': 'affected', 'version': '57a9a117154c93539e33161dd318e6aeb8c04efa', 'lessThan': '9ce754ed8e7ab4e3999767ce1505f85c449ccb07', 'versionType': 'git'}], 'programFiles': ['arch/arm64/kvm/vgic/vgic-its.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.12', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.142', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/arm64/kvm/vgic/vgic-its.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that state, but vgic_its_restore_dte() accepts it and stores the out-of-range value in dev->num_eventid_bits. Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before allocating the device. This mirrors the MAPD check and prevents the restored state from reaching vgic_its_restore_itt(), where the unchecked value can be converted into an oversized scan_its_table() range.
    Added Reference https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316
    Added Reference https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d
    Added Reference https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95
    Added Reference https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07
    Added Reference https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7
    Added Reference https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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