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.
History

Fri, 28 Aug 2026 23:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 26 Aug 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Rustdesk
Rustdesk rustdesk
Vendors & Products Rustdesk
Rustdesk rustdesk

Wed, 26 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
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.
Title RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-28T22:49:32.867Z

Reserved: 2026-08-10T21:04:42.166Z

Link: CVE-2026-73108

cve-icon Vulnrichment

Updated: 2026-08-28T22:49:28.994Z

cve-icon NVD

Status : Received

Published: 2026-08-26T14:17:12.830

Modified: 2026-08-28T23:17:11.710

Link: CVE-2026-73108

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T15:00:07Z