FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, offscreen bitmap deletion leaves `gdi->drawing` pointing to freed memory, causing UAF when related update packets arrive. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.
CVSS Details
- CVSS 4.0 Base Score: 7.7 (HIGH)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libwinprUpgrade freerdp-libsUpgrade libwinpr-develUpgrade freerdpUpgrade freerdp-devel | Feb 9, 2026 | Feb 5, 2026 |
| Alpine Linux | — | Upgrade freerdp | Feb 10, 2026 | Jan 19, 2026 |
| Amazon Linux Ami 2 | — | Upgrade freerdp-libsUpgrade libwinprUpgrade freerdp-develUpgrade freerdpUpgrade freerdp-debuginfoUpgrade libwinpr-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade libwinpr-debuginfoUpgrade libwinprUpgrade freerdp-debugsourceUpgrade freerdp-debuginfoUpgrade freerdpUpgrade freerdp-libsUpgrade freerdp-server-debuginfoUpgrade freerdp-serverUpgrade freerdp-libs-debuginfoUpgrade freerdp-develUpgrade libwinpr-devel | Feb 10, 2026 | Jan 19, 2026 |
| Debian | — | Upgrade freerdp3 | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade libwinpr-develUpgrade freerdp-serverUpgrade freerdpUpgrade freerdp-develUpgrade freerdp-libsUpgrade libwinpr | Feb 9, 2026 | Jan 19, 2026 |
| Redhat_linux | — | Upgrade freerdp-develUpgrade freerdp-server-debuginfoUpgrade libwinprUpgrade freerdp-libsNo solution existsUpgrade freerdp-serverUpgrade libwinpr-debuginfoUpgrade freerdp-libs-debuginfoUpgrade libwinpr-develUpgrade freerdp-debugsourceUpgrade freerdp-debuginfoUpgrade freerdp | Feb 10, 2026 | Jan 19, 2026 |
| Rocky_linux | — | Upgrade freerdp-develUpgrade freerdp-debuginfoUpgrade freerdp-libs-debuginfoUpgrade freerdp-serverUpgrade libwinprUpgrade freerdp-libsUpgrade freerdp-server-debuginfoUpgrade freerdp-debugsourceUpgrade libwinpr-develUpgrade freerdpUpgrade libwinpr-debuginfo | Feb 9, 2026 | Feb 6, 2026 |
| Suse | — | Upgrade freerdp-develUpgrade freerdp-serverUpgrade freerdp-sdlUpgrade libwinpr3-3Upgrade winpr-develUpgrade librdtk0-0Upgrade freerdp-proxyUpgrade freerdpUpgrade freerdp-proxy-pluginsUpgrade libfreerdp-server-proxy3-3Upgrade libfreerdp3-3 | Feb 2, 2026 | Jan 30, 2026 |
| Ubuntu | — | Upgrade libfreerdp3-3 | Mar 19, 2026 | Jan 19, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub