Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements (CVE-2026-5706) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-5706

Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements

Answer in brief

CVE-2026-5706 records a Unknown severity vulnerability in Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements. The current sources do not mark it as known exploited. The current feed maps Silicon Labs/BT Mesh SDK (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 Aug 27, 2026Updated Aug 27, 2026Source checked Aug 28, 2026First seen by HOL Aug 27, 2026Material review Aug 27, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

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 Silicon Labs/BT Mesh SDK (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Silicon Labs/BT Mesh SDKgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Silicon Labs/BT Mesh SDK.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 27, 2026

Sources and claim methodology

Upstream source description

In Bluetooth Mesh SDK 6.1.4 and earlier, malformed extended advertisements can trigger out-of-bounds writes leading to stack corruption and remote code execution. These messages must come from a device that has already joined the network. Only provisioners supporting extended advertisements may be impacted.

Quoted source text, attributed separately from HOL analysis.