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.
CVSS Details
- CVSS 4.0 Base Score: 5.5 (MEDIUM)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libwinpr-develUpgrade libwinprUpgrade freerdpUpgrade freerdp-libsUpgrade freerdp-devel | Apr 3, 2026 | Apr 1, 2026 |
| Alpine Linux | — | Upgrade freerdp | Feb 10, 2026 | Jan 19, 2026 |
| Amazon Linux Ami 2 | — | Upgrade libwinpr-develUpgrade freerdpUpgrade freerdp-libsUpgrade freerdp-develUpgrade freerdp-debuginfoUpgrade libwinpr | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade freerdp-debuginfoUpgrade freerdp-serverUpgrade libwinprUpgrade freerdp-libs-debuginfoUpgrade freerdp-libsUpgrade libwinpr-debuginfoUpgrade freerdp-develUpgrade libwinpr-develUpgrade freerdp-server-debuginfoUpgrade freerdp-debugsourceUpgrade freerdp | Feb 20, 2026 | Jan 19, 2026 |
| Debian | — | Upgrade freerdp3 | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade freerdpUpgrade libwinpr-develUpgrade libwinprUpgrade freerdp-develUpgrade freerdp-serverUpgrade freerdp-libs | Apr 2, 2026 | Jan 19, 2026 |
| Redhat_linux | — | Upgrade libwinprUpgrade freerdpUpgrade freerdp-libs-debuginfoNo solution existsUpgrade freerdp-server-debuginfoUpgrade freerdp-develUpgrade libwinpr-develUpgrade freerdp-debuginfoUpgrade freerdp-serverUpgrade freerdp-libsUpgrade freerdp-debugsourceUpgrade libwinpr-debuginfo | Apr 2, 2026 | Jan 19, 2026 |
| Rocky_linux | — | Upgrade freerdp-debugsourceUpgrade libwinpr-develUpgrade libwinpr-debuginfoUpgrade freerdpUpgrade freerdp-libsUpgrade libwinprUpgrade freerdp-libs-debuginfoUpgrade freerdp-server-debuginfoUpgrade freerdp-serverUpgrade freerdp-debuginfoUpgrade freerdp-devel | Apr 8, 2026 | Apr 7, 2026 |
| Suse | — | Upgrade freerdp-proxyUpgrade libwinpr3-3Upgrade freerdp-proxy-pluginsUpgrade freerdp-serverUpgrade winpr-develUpgrade freerdpUpgrade libfreerdp3-3Upgrade libfreerdp-server-proxy3-3Upgrade freerdp-sdlUpgrade freerdp-develUpgrade librdtk0-0 | Feb 2, 2026 | Jan 30, 2026 |
| Ubuntu | — | Upgrade libfreerdp3-3 | Mar 19, 2026 | Jan 19, 2026 |
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