firmware: arm_scmi: Avoid IDR updates while cleaning channels (CVE-2026-93086) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93086

firmware: arm_scmi: Avoid IDR updates while cleaning channels

Answer in brief

CVE-2026-93086 records a Unknown severity vulnerability in firmware: arm_scmi: Avoid IDR updates while cleaning channels. 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	>=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <aed24a3c63920539e9de7fbfe7929a2e7c888cd2 \|\| >=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <431c6b872ba7fedcc5a3afb0ec3517db4d95d088 \|\| >=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <54e5a4f7d83db4552d963d0785be32d9df680dcd \|\| >=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <bab26acebe55e8ad3ab545abda72faa7ca28c477 \|\| >=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <c38b1e19485aaa820e52cfe162525a8af67563da	aed24a3c63920539e9de7fbfe7929a2e7c888cd2, 431c6b872ba7fedcc5a3afb0ec3517db4d95d088, 54e5a4f7d83db4552d963d0785be32d9df680dcd, bab26acebe55e8ad3ab545abda72faa7ca28c477, c38b1e19485aaa820e52cfe162525a8af67563da
Linux/Linuxgeneric	6.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to aed24a3c63920539e9de7fbfe7929a2e7c888cd2 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: firmware: arm_scmi: Avoid IDR updates while cleaning channels scmi_cleanup_channels() walks the TX/RX channel IDRs with idr_for_each() to free transport resources and destroy the dedicated transport devices before calling idr_destroy(). The destroy callback removed each entry from the same IDR being walked. That is not needed for this cleanup path, and it is unsafe because idr_for_each() has not advanced its radix-tree iterator while the callback is running. Removing the current entry from the callback can invalidate the iterator state. The callback also cannot be protected by rcu_read_lock(), because scmi_device_destroy() may sleep. Leave IDR teardown to the following idr_destroy() call and keep the callback limited to device destruction.

Quoted source text, attributed separately from HOL analysis.