FreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when processing Server Redirection PDU messages with attacker-controlled LoadBalanceInfo fields. A malicious RDP server can trigger the overflow by sending an arbitrary-length field that gets written to a fixed 512-byte buffer without validation, causing client crashes or potential code execution when chained with memory disclosure.
CVSS Details
- CVSS 4.0 Base Score: 8.7 (HIGH)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libwinprUpgrade freerdpUpgrade freerdp-develUpgrade libwinpr-develUpgrade freerdp-libs | Oct 11, 2026 | Oct 6, 2026 |
| Amazon Linux Ami 2 | — | Upgrade freerdpUpgrade libwinpr-develUpgrade freerdp-debuginfoUpgrade freerdp-develUpgrade libwinprUpgrade freerdp-libs | Oct 19, 2026 | Oct 19, 2026 |
| Amazon_linux_2023 | — | Upgrade freerdp-libs-debuginfoUpgrade freerdp-server-debuginfoUpgrade libwinpr-debuginfoUpgrade freerdp-libsUpgrade freerdp-serverUpgrade libwinprUpgrade freerdp-develUpgrade freerdp-debugsourceUpgrade freerdpUpgrade libwinpr-develUpgrade freerdp-debuginfo | Sep 30, 2026 | Sep 15, 2026 |
| Oracle_linux | — | Upgrade freerdp-develUpgrade freerdp-libsUpgrade freerdp-serverUpgrade libwinpr-develUpgrade freerdpUpgrade libwinpr | Oct 22, 2026 | Sep 15, 2026 |
| Redhat_linux | — | Upgrade freerdp-serverNo solution existsUpgrade libwinpr-develUpgrade freerdp-libs-debuginfoUpgrade freerdp-libsUpgrade freerdp-debuginfoUpgrade freerdp-debugsourceUpgrade libwinpr-debuginfoUpgrade freerdp-server-debuginfoUpgrade libwinprUpgrade freerdp-develUpgrade freerdp | Sep 17, 2026 | Sep 15, 2026 |
| Rocky_linux | — | Upgrade freerdp-debugsourceUpgrade freerdpUpgrade libwinpr-develUpgrade freerdp-debuginfoUpgrade libwinpr-debuginfoUpgrade freerdp-libsUpgrade freerdp-develUpgrade libwinprUpgrade freerdp-serverUpgrade freerdp-server-debuginfoUpgrade freerdp-libs-debuginfo | Oct 8, 2026 | Oct 7, 2026 |
| Ubuntu | — | Upgrade freerdp3 | Sep 22, 2026 | Sep 16, 2026 |
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