Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/rustdesk/hbb_common/commit/547da54b4ee58eed47163fbd47edb4639e
- https://github.com/rustdesk/rustdesk/commit/518296f2570d107ad416f29ade5fcce3177f
- https://github.com/rustdesk/rustdesk/releases/tag/1.4.7
- https://www.vulncheck.com/advisories/rustdesk-uncontrolled-memory-allocation-dos
FAQ
What is CVE-2026-73108?
CVE-2026-73108 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 fr...
How severe is CVE-2026-73108?
CVE-2026-73108 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73108?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.