CVE-2026-73108
RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | rustdesk |
| Product | rustdesk |
| Published | Aug 26, 2026 |
Stay Ahead of the Next One
Get instant alerts for rustdesk rustdesk
Be the first to know when new high vulnerabilities affecting rustdesk rustdesk are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
rustdesk / rustdesk
0 < 1.4.7
References
github.com: https://github.com/rustdesk/rustdesk/releases/tag/1.4.7 github.com: https://github.com/rustdesk/hbb_common/commit/547da54b4ee58eed47163fbd47edb4639e3d88de github.com: https://github.com/rustdesk/rustdesk/commit/518296f2570d107ad416f29ade5fcce3177f4115 vulncheck.com: https://www.vulncheck.com/advisories/rustdesk-uncontrolled-memory-allocation-dos-via-bytescodec