CVE-2026-64287

EL2 compromise via unchecked vGIC list bound

Published Jul 25, 2026 · Updated Jul 25, 2026

Out-of-bounds access in arm64 pKVM in Linux Kernel allows local users with host-kernel control to compromise EL2. flush_hyp_vcpu() copies untrusted host vGIC state verbatim, then uses unchecked used_lrs to index vgic_lr[] and ICH_LR_EL2 beyond implemented list registers. Exploitation requires administrative control of an arm64 EL1 host using pKVM and GICv3, and it can expose or corrupt hypervisor-private state or panic the host.

CVSS severity8.2
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in arm64 pKVM in Linux Kernel allows local users with host-kernel control to compromise EL2. flush_hyp_vcpu() copies untrusted host vGIC state verbatim, then uses unchecked used_lrs to index vgic_lr[] and ICH_LR_EL2 beyond implemented list registers. Exploitation requires administrative control of an arm64 EL1 host using pKVM and GICv3, and it can expose or corrupt hypervisor-private state or panic the host.

The record

CVE
CVE-2026-64287
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=6.2
  2. Affected versionversion=be66e67f175096f283c9d5614c4991fc9e7ed975 <2c5e72b9fbf83fdfa724e9f1af0f418ccf8739b8
  3. Affected versionversion=be66e67f175096f283c9d5614c4991fc9e7ed975 <7fca3fcef81c713bc82a37bf741e0f28e6d04a6f
  4. Affected versionversion=be66e67f175096f283c9d5614c4991fc9e7ed975 <8cc8bbbfab14c22c5551d0dd19b208a44b141c76
  5. Affected versionversion=be66e67f175096f283c9d5614c4991fc9e7ed975 <9fa301d8298778dd799fa4dcf7a7f440715d146e
  6. Affected versionversion=be66e67f175096f283c9d5614c4991fc9e7ed975 <c646431865f4b1a5b14067233fa27b11e05e0d46

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.2; version=be66e67f175096f283c9d5614c4991fc9e7ed975 <2c5e72b9fbf83fdfa724e9f1af0f418ccf8739b8; version=be66e67f175096f283c9d5614c4991fc9e7ed975 <7fca3fcef81c713bc82a37bf741e0f28e6d04a6f; version=be66e67f175096f283c9d5614c4991fc9e7ed975 <8cc8bbbfab14c22c5551d0dd19b208a44b141c76; version=be66e67f175096f283c9d5614c4991fc9e7ed975 <9fa301d8298778dd799fa4dcf7a7f440715d146e; version=be66e67f175096f283c9d5614c4991fc9e7ed975 <c646431865f4b1a5b14067233fa27b11e05e0d46

Published CVSS scores

8.2Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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