Copyright © 2012 Red Hat, Inc. All rights reserved. Important 2026-06-09T09:23:18 kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources 8.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N CWE-266

Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710, Cortex-A78, A78AE & A78C, Cortex-A77, Cortex-A76 & A76A may allow writes to resources owned by a higher exception level.

A flaw was found in the Linux kernel on ARM processors. A race condition in Translation Lookaside Buffer Invalidation (TLBI) operations during memory permission changes allows a local attacker to write to memory resources owned by higher privilege levels. This could allow an unprivileged local attacker to gain kernel privileges or a guest VM to escape to the hypervisor, resulting in complete system compromise.

This is an Important flaw in the Linux kernel on ARM processors, allowing a local unprivileged attacker to achieve privilege escalation to kernel level or a guest virtual machine to escape to the hypervisor. The vulnerability stems from a race condition during Translation Lookaside Buffer Invalidation (TLBI) operations when memory permissions are altered, enabling writes to higher exception level resources. Red Hat Enterprise Linux 10 2026-07-02T00:00:00Z RHSA-2026:34911 kernel-0:6.12.0-211.30.1.el10_2 Red Hat Enterprise Linux 8 2026-07-07T00:00:00Z RHSA-2026:36348 kernel-rt-0:4.18.0-553.140.1.rt7.481.el8_10 Red Hat Enterprise Linux 8 2026-07-07T00:00:00Z RHSA-2026:36349 kernel-0:4.18.0-553.140.1.el8_10 Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 2026-07-28T00:00:00Z RHSA-2026:47248 kernel-0:4.18.0-305.200.1.el8_4 Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 2026-07-28T00:00:00Z RHSA-2026:47248 kernel-0:4.18.0-305.200.1.el8_4 Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 2026-07-31T00:00:00Z RHSA-2026:49033 kernel-0:4.18.0-372.204.1.el8_6 Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 2026-07-31T00:00:00Z RHSA-2026:49033 kernel-0:4.18.0-372.204.1.el8_6 Red Hat Enterprise Linux 9 2026-07-06T00:00:00Z RHSA-2026:36018 kernel-0:5.14.0-687.22.1.el9_8 Red Hat Enterprise Linux 9 2026-07-06T00:00:00Z RHSA-2026:36018 kernel-0:5.14.0-687.22.1.el9_8 Red Hat Enterprise Linux 9.6 Extended Update Support 2026-07-31T00:00:00Z RHSA-2026:49031 kernel-0:5.14.0-570.131.1.el9_6 Red Hat OpenShift Container Platform 4.22 2026-07-21T00:00:00Z RHSA-2026:40764 rhcos-4.22.9.8.202607152026-0 Red Hat Enterprise Linux 10 Not affected libkrun Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel-rt Red Hat Enterprise Linux for NVIDIA 26 Affected kernel https://www.cve.org/CVERecord?id=CVE-2025-10263 https://nvd.nist.gov/vuln/detail/CVE-2025-10263 https://developer.arm.com/documentation/112137