FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, FastGlyph parsing trusts `cbData`/remaining length and never validates against the minimum size implied by `cx/cy`. A malicious server can trigger a client‑side global buffer overflow, causing a crash (DoS). Version 3.21.0 contains a patch for the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libwinprUpgrade libwinpr-develUpgrade freerdpUpgrade freerdp-develUpgrade freerdp-libs | Apr 3, 2026 | Apr 1, 2026 |
| Alpine Linux | — | Upgrade freerdp | Feb 10, 2026 | Jan 19, 2026 |
| Amazon Linux Ami 2 | — | Upgrade freerdp-develUpgrade freerdp-debuginfoUpgrade freerdp-libsUpgrade libwinprUpgrade libwinpr-develUpgrade freerdp | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade freerdpUpgrade libwinpr-develUpgrade freerdp-develUpgrade freerdp-debugsourceUpgrade freerdp-server-debuginfoUpgrade libwinpr-debuginfoUpgrade freerdp-debuginfoUpgrade freerdp-libsUpgrade freerdp-serverUpgrade freerdp-libs-debuginfoUpgrade libwinpr | Feb 20, 2026 | Jan 19, 2026 |
| Debian | — | Upgrade freerdp3 | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade libwinprUpgrade freerdpUpgrade libwinpr-develUpgrade freerdp-serverUpgrade freerdp-develUpgrade freerdp-libs | Apr 2, 2026 | Jan 19, 2026 |
| Redhat_linux | — | Upgrade libwinpr-debuginfoUpgrade freerdp-debugsourceUpgrade freerdp-debuginfoUpgrade freerdp-serverUpgrade freerdp-libsUpgrade freerdp-server-debuginfoUpgrade libwinpr-develUpgrade libwinprUpgrade freerdp-libs-debuginfoUpgrade freerdp-develUpgrade freerdpNo solution exists | Apr 2, 2026 | Jan 19, 2026 |
| Rocky_linux | — | Upgrade freerdp-libsUpgrade freerdp-serverUpgrade freerdp-debuginfoUpgrade libwinprUpgrade freerdp-libs-debuginfoUpgrade freerdp-server-debuginfoUpgrade freerdp-develUpgrade freerdp-debugsourceUpgrade libwinpr-develUpgrade libwinpr-debuginfoUpgrade freerdp | Apr 8, 2026 | Apr 7, 2026 |
| Suse | — | Upgrade libwinpr3-3Upgrade freerdp-serverUpgrade winpr-develUpgrade freerdp-proxyUpgrade freerdp-proxy-pluginsUpgrade freerdp-sdlUpgrade libfreerdp3-3Upgrade librdtk0-0Upgrade libfreerdp-server-proxy3-3Upgrade freerdp-develUpgrade freerdp | Feb 2, 2026 | Jan 30, 2026 |
| Ubuntu | — | Upgrade libfreerdp3-3 | Mar 19, 2026 | Jan 19, 2026 |
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