---
id: CVE-2026-90306
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ARM: 9481/2: breakpoint: CFI breakpoints only on demand

  This removes the stub hw_breakpoint_cfi_handler() from ARM, making
  it not steal breakpoint type 0x03 (ARM_ENTRY…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ARM: 9481/2: breakpoint: CFI breakpoints only on demand

  This removes the stub hw_breakpoint_cfi_handler() from ARM, making
  it not steal breakpoint type 0x03 (ARM_ENTRY…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <
    22107402c2669b0163d43cc68901a2c4a59fa43a
  - >-
    Linux >= c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <
    314f1a6762b5d51b37784ed7dc701d4c3d893703
  - >-
    Linux >= c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <
    da64b150e4b7bee615b33ab21f3137c31ec36922
  - >-
    Linux >= c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <
    8ed9bff906cf8036531d1559f10e82733a52b41f
  - Linux 6.10
published: '2026-09-17'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T14:17:28.903'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90306'
references:
  - url: 'https://git.kernel.org/stable/c/314f1a6762b5d51b37784ed7dc701d4c3d893703'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8ed9bff906cf8036531d1559f10e82733a52b41f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da64b150e4b7bee615b33ab21f3137c31ec36922'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/22107402c2669b0163d43cc68901a2c4a59fa43a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00198
epssPercentile: 0.09839
ingestedAt: '2026-09-17T16:21:47.828Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

ARM: 9481/2: breakpoint: CFI breakpoints only on demand

This removes the stub hw_breakpoint_cfi_handler() from ARM, making
it not steal breakpoint type 0x03 (ARM_ENTRY_CFI_BREAKPOINT) unless
CFI is actively used in the kernel.

When not instrumenting with CFI, or when a breakpoint is issued in
userspace, we fall through to return 1 from hw_breakpoint_pending()
"unhandled fault" so userspace can make use of this breakpoint.

Tested with LKDTM and this command line:
echo CFI_FORWARD_PROTO > /sys/kernel/debug/provoke-crash/DIRECT
still works as expected.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.