CVE-2025-10263Hinoki check available

Privilege escalation via premature TLBI completion

Published Jun 9, 2026 · Updated Aug 27, 2026

Privilege escalation in affected Arm CPU cores allows local users to write memory owned by a higher exception level via a TLBI race. A broadcast TLBI can complete before another processing element's affected store becomes globally observable, allowing the store to finish after permissions change. Exploitation requires local code execution and a multicore affected system; it grants kernel privileges or lets a guest escape to the hypervisor.

CVSS severity9.1
Critical
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Privilege escalation in affected Arm CPU cores allows local users to write memory owned by a higher exception level via a TLBI race. A broadcast TLBI can complete before another processing element's affected store becomes globally observable, allowing the store to finish after permissions change. Exploitation requires local code execution and a multicore affected system; it grants kernel privileges or lets a guest escape to the hypervisor.

The record

CVE
CVE-2025-10263
Published
Jun 9, 2026
Updated
Aug 27, 2026
Vendor
Arm
Product
Cortex-X925
Classifications
CWE-362, CWE-266, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Arm · Cortex-X925version=0
Arm · Cortex-X1Cversion=0
Arm · Cortex-A78version=0
Arm · Cortex-X3version=0
Arm · Neoverse N1version=0
389 Directory Server · Red Hat OpenShift Container Platform 4.21Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.18Affected versions are unavailable in this record.
Arm · Neoverse-N2version=0
Arm · C1-Ultraversion=0
Arm · Cortex-X2version=0
389 Directory Server · Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsAffected versions are unavailable in this record.
Arm · Neoverse-V3version=0
389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux for NVIDIAAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsAffected versions are unavailable in this record.
Arm · Cortex-A76version=0
389 Directory Server · Red Hat OpenShift Container Platform 4.19Affected versions are unavailable in this record.
Arm · Cortex-X1version=0
389 Directory Server · Red Hat OpenShift Container Platform 4.22Affected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.13Affected versions are unavailable in this record.
Arm · C1-Premiumversion=0
Arm · Neoverse V1version=0
Arm · Cortex-A710version=0
Arm · Neoverse-V3AEversion=0
Arm · Cortex-X4version=0
389 Directory Server · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.12Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnAffected versions are unavailable in this record.
Arm · Cortex-A78Cversion=0
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceAffected versions are unavailable in this record.
Arm · Cortex-A76AEversion=0
389 Directory Server · Red Hat Enterprise Linux 10.0 Extended Update SupportAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9.6 Extended Update SupportAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Arm · Cortex-A77version=0
Arm · Cortex-A78AEversion=0
389 Directory Server · Red Hat OpenShift Container Platform 4.20Affected versions are unavailable in this record.

Published CVSS scores

8.4Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-266Incorrect Privilege Assignment
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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