RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec (CVE-2026-73108) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-73108

RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec

Answer in brief

CVE-2026-73108 records a Unknown severity vulnerability in RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec. The current sources do not mark it as known exploited. The current feed maps rustdesk/rustdesk (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 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 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: 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 rustdesk/rustdesk (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rustdesk/rustdeskgeneric	>=0 <1.4.7	1.4.7

Recommended response

Check inventory. Check lockfiles and deployed manifests for rustdesk/rustdesk.
Review the reported fix. Update rustdesk/rustdesk to 1.4.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

RustDesk versions before 1.4.7 contain an uncontrolled speculative memory allocation vulnerability in BytesCodec. Before authentication, the decoder trusts the payload length encoded in a four-byte frame header and reserves that amount before receiving the payload. A crafted header can request up to 1,073,741,823 bytes of capacity, allowing unauthenticated attackers to use concurrent TCP connections to cause memory exhaustion and denial of service. The fix caps header-triggered speculative preallocation at 256 KiB.

Quoted source text, attributed separately from HOL analysis.