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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-90306

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

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 to < 314f1a6762b5d51b37784ed7dc701d4c3d893703affected
  • c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 to < da64b150e4b7bee615b33ab21f3137c31ec36922affected
  • c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 to < 8ed9bff906cf8036531d1559f10e82733a52b41faffected

Linux Linux

Default version status: affected

  • 6.10affected
  • 0 to < 6.10unaffected
  • 6.18.52 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References