Riskcovery

CVE-2026-90306

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

State
Published
Severity
Not scored
Published
Sep 17, 2026
Updated
Oct 19, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 to before 314f1a6762b5d51b37784ed7dc701d4c3d893703Affected
  • c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 to before da64b150e4b7bee615b33ab21f3137c31ec36922Affected
  • c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 to before 8ed9bff906cf8036531d1559f10e82733a52b41fAffected
LinuxLinux
  • 6.10Affected
  • before 6.10Not affected
  • 6.18.52 through 6.18.*Not affected
  • 7.2.6 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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