ARM: 9481/2: breakpoint: CFI breakpoints only on demand (CVE-2026-90306) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90306

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

Answer in brief

CVE-2026-90306 records a Unknown severity vulnerability in ARM: 9481/2: breakpoint: CFI breakpoints only on demand. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <22107402c2669b0163d43cc68901a2c4a59fa43a \|\| >=c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <314f1a6762b5d51b37784ed7dc701d4c3d893703 \|\| >=c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <da64b150e4b7bee615b33ab21f3137c31ec36922 \|\| >=c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3 <8ed9bff906cf8036531d1559f10e82733a52b41f	22107402c2669b0163d43cc68901a2c4a59fa43a, 314f1a6762b5d51b37784ed7dc701d4c3d893703, da64b150e4b7bee615b33ab21f3137c31ec36922, 8ed9bff906cf8036531d1559f10e82733a52b41f
Linux/Linuxgeneric	6.10	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 22107402c2669b0163d43cc68901a2c4a59fa43a if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.