CVE-2026-91953
Fixed in a distro release EPSS <1%CVSS 6.5
FreeRDP versions before 3.31.0 contain a heap buffer overflow vulnerability in nego_send_negotiation_request() that fails to validate the LB_LOAD_BALANCE_INFO field length before writing to a fixed 512-byte buffer. A malicious RDP server or man-in-the-middle can send a Server Redirection PDU with an oversized LB_LOAD_BALANCE_INFO value to overflow the buffer with attacker-controlled content, causing denial of service or heap corruption before authentication completes.
Products: FreeRDP
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | freerdp | 2:3.10.3-12.el10_2.14 |
| AlmaLinux 10 | freerdp-devel | 2:3.10.3-12.el10_2.14 |
| AlmaLinux 10 | freerdp-libs | 2:3.10.3-12.el10_2.14 |
| AlmaLinux 10 | freerdp-server | 2:3.10.3-12.el10_2.14 |
| AlmaLinux 10 | libwinpr | 2:3.10.3-12.el10_2.14 |
| AlmaLinux 10 | libwinpr-devel | 2:3.10.3-12.el10_2.14 |
| AlmaLinux 8 | freerdp | 2:2.11.7-14.el8_10 |
| AlmaLinux 8 | freerdp-devel | 2:2.11.7-14.el8_10 |
| AlmaLinux 8 | freerdp-libs | 2:2.11.7-14.el8_10 |
| AlmaLinux 8 | libwinpr | 2:2.11.7-14.el8_10 |
| AlmaLinux 8 | libwinpr-devel | 2:2.11.7-14.el8_10 |
| AlmaLinux 9 | freerdp | 2:2.11.7-7.el9_8.8 |
| AlmaLinux 9 | freerdp-devel | 2:2.11.7-7.el9_8.8 |
| AlmaLinux 9 | freerdp-libs | 2:2.11.7-7.el9_8.8 |
| AlmaLinux 9 | libwinpr | 2:2.11.7-7.el9_8.8 |
| AlmaLinux 9 | libwinpr-devel | 2:2.11.7-7.el9_8.8 |
| Amazon Linux 2 | freerdp | 2:2.11.7-1.amzn2.0.16 |
| Amazon Linux 2 | freerdp-devel | 2:2.11.7-1.amzn2.0.16 |
| Amazon Linux 2 | freerdp-libs | 2:2.11.7-1.amzn2.0.16 |
| Amazon Linux 2 | libwinpr | 2:2.11.7-1.amzn2.0.16 |
| Amazon Linux 2 | libwinpr-devel | 2:2.11.7-1.amzn2.0.16 |
| Amazon Linux 2023 | freerdp | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | freerdp-devel | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | freerdp-libs | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | freerdp-server | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | libwinpr | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | libwinpr-devel | 2:3.31.0-1.amzn2023 |
| Debian 12 | freerdp2 | no fix |
| Debian 13 | freerdp3 | no fix |
| Debian 14 | freerdp3 | 3.31.0+dfsg-1 |
| Red Hat Enterprise Linux 10.2 | freerdp | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | freerdp-debuginfo | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | freerdp-debugsource | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | freerdp-devel | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs-debuginfo | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | freerdp-server | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | freerdp-server-debuginfo | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | libwinpr | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | libwinpr-debuginfo | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | libwinpr-devel | 2:3.10.3-12.el10_2.14 |
| Red Hat Enterprise Linux 8 | freerdp | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-debuginfo | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-debugsource | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-devel | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-libs | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-libs-debuginfo | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | libwinpr | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | libwinpr-debuginfo | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 8 | libwinpr-devel | 2:2.11.7-14.el8_10 |
| Red Hat Enterprise Linux 9 | freerdp | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | freerdp-debuginfo | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | freerdp-debugsource | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | freerdp-devel | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | freerdp-libs | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | freerdp-libs-debuginfo | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | libwinpr | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | libwinpr-debuginfo | 2:2.11.7-7.el9_8.8 |
| Red Hat Enterprise Linux 9 | libwinpr-devel | 2:2.11.7-7.el9_8.8 |
| Rocky Linux 10 | freerdp | 2:3.10.3-12.el10_2.14 |
| Rocky Linux 8 | freerdp | 2:2.11.7-14.el8_10 |
| Rocky Linux 9 | freerdp | 2:2.11.7-7.el9_8.8 |
| Ubuntu 16.04 LTS | freerdp | no fix |
| Ubuntu 18.04 LTS | freerdp | no fix |
| Ubuntu 22.04 LTS | freerdp2 | no fix |
| Ubuntu 24.04 LTS | freerdp3 | 3.31.0+dfsg-0ubuntu0.24.04.1 |
| Ubuntu 26.04 LTS | freerdp3 | 3.31.0+dfsg-0ubuntu0.26.04.1 |
| Ubuntu Pro 18.04 LTS | freerdp2 | no fix |
| Ubuntu Pro 20.04 LTS | freerdp2 | no fix |
| Ubuntu Pro 24.04 LTS | freerdp2 | no fix |