What’s Vulnerable › Vulnerabilities

CVE-2022-39318: Division by zero in urbdrc channel in FreeRDP

• Severity: medium (CVSS 5.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-16 · updated 2026-06-17
• Weakness: CWE-20

Description

FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing input validation in `urbdrc` channel. A malicious server can trick a FreeRDP based client to crash with division by zero. This issue has been addressed in version 2.9.0. All users are advised to upgrade. Users unable to upgrade should not use the `/usb` redirection switch.

Affected products

• Fedoraproject Fedora: 36, 37
• FreeRDP: before 2.9.0 — fixed in 2.9.0

How to fix

Upgrade to a fixed version: FreeRDP 2.9.0. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/commit/80adde17ddc4b596ed1dae0922a0c54ab3d4b8ea
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-387j-8j96-7q35
• https://lists.debian.org/debian-lts-announce/2023/11/msg00010.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UDOTAOJBCZKREZJPT6VZ25GESI5T6RBG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGQN3OWQNHSMWKOF4D35PF5ASKNLC74B/
• https://security.gentoo.org/glsa/202401-16
• https://github.com/FreeRDP/FreeRDP/commit/80adde17ddc4b596ed1dae0922a0c54ab3d4b8ea
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-387j-8j96-7q35
• https://lists.debian.org/debian-lts-announce/2023/11/msg00010.html
• https://lists.debian.org/debian-lts-announce/2025/02/msg00016.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UDOTAOJBCZKREZJPT6VZ25GESI5T6RBG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGQN3OWQNHSMWKOF4D35PF5ASKNLC74B/

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