Vulnerability · Published Aug 26, 2026 · Assigned by VulnCheck

CVE-2026-73108RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec

High 7.5

In plain English

A high-severity resource allocation without limits in rustdesk from rustdesk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.8%top 44.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
rustdesk	rustdesk	0 – before 1.4.7

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

RustDesk 1.4.7 Release Notes release-notes
hbb_common Patch Commit patch
RustDesk Patch Commit patch
https://www.vulncheck.com/advisories/rustdesk-uncontrolled-memory-allocation-dos-via-bytescodec third-party-advisory