CVE-2026-91964
freerdp3: FreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when processing...
CVE-2026-91964 is fixed in 34 products on 1 platform, first by ALAS2023-2026-2142, released September 14, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0060
49th percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| freerdp · RHEL 10 | 3.10.3-12.el10_2.14 | RHSA-2026:75570 | Oct 5, 2026 |
| freerdp · RHEL 8 | 2:2.11.7-14.el8_10 | RHSA-2026:76747 | Oct 6, 2026 |
| freerdp · RHEL 9 | 2:2.11.7-7.el9_8.8 | RHSA-2026:76755 | Oct 9, 2026 |
| freerdp · almalinux 10 | 2:3.10.3-12.el10_2.14 | ALSA-2026:75570 | Oct 5, 2026 |
| freerdp · almalinux 8 | 2:2.11.7-14.el8_10 | ALSA-2026:76747 | Oct 6, 2026 |
| freerdp · almalinux 9 | 2:2.11.7-7.el9_8.8 | ALSA-2026:76755 | Oct 6, 2026 |
| freerdp · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp · ol 10 | 2:3.10.3-12.el10_2.14 | ELSA-2026-75570 | Oct 6, 2026 |
| freerdp · ol 8 | 2:2.11.7-14.el8_10 | ELSA-2026-76747 | Oct 6, 2026 |
| freerdp · ol 9 | 2:2.11.7-7.el9_8.8 | ELSA-2026-76755 | Oct 7, 2026 |
| freerdp · rocky 10 | 2:3.10.3-12.el10_2.14 | RLSA-2026:75570 | Oct 6, 2026 |
| freerdp · rocky 8 | 2:2.11.7-14.el8_10 | RLSA-2026:76747 | Oct 7, 2026 |
| freerdp · rocky 9 | 2:2.11.7-7.el9_8.8 | RLSA-2026:76755 | Nov 7, 2026 |
| freerdp-debuginfo · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp-debugsource · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp-devel · RHEL 8 | 2:2.11.7-14.el8_10 | RHSA-2026:76747 | Oct 6, 2026 |
| freerdp-devel · RHEL 9 | 2:2.11.7-7.el9_8.8 | RHSA-2026:76755 | Oct 9, 2026 |
| freerdp-devel · almalinux 10 | 2:3.10.3-12.el10_2.14 | ALSA-2026:75570 | Oct 5, 2026 |
| freerdp-devel · almalinux 8 | 2:2.11.7-14.el8_10 | ALSA-2026:76747 | Oct 6, 2026 |
| freerdp-devel · almalinux 9 | 2:2.11.7-7.el9_8.8 | ALSA-2026:76755 | Oct 6, 2026 |
| freerdp-devel · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp-devel · ol 10 | 2:3.10.3-12.el10_2.14 | ELSA-2026-75570 | Oct 6, 2026 |
| freerdp-devel · ol 8 | 2:2.11.7-14.el8_10 | ELSA-2026-76747 | Oct 6, 2026 |
| freerdp-devel · ol 9 | 2:2.11.7-7.el9_8.8 | ELSA-2026-76755 | Oct 7, 2026 |
| freerdp-libs · RHEL 8 | 2:2.11.7-14.el8_10 | RHSA-2026:76747 | Oct 6, 2026 |
| freerdp-libs · RHEL 9 | 2:2.11.7-7.el9_8.8 | RHSA-2026:76755 | Oct 9, 2026 |
| freerdp-libs · almalinux 10 | 2:3.10.3-12.el10_2.14 | ALSA-2026:75570 | Oct 5, 2026 |
| freerdp-libs · almalinux 8 | 2:2.11.7-14.el8_10 | ALSA-2026:76747 | Oct 6, 2026 |
| freerdp-libs · almalinux 9 | 2:2.11.7-7.el9_8.8 | ALSA-2026:76755 | Oct 6, 2026 |
| freerdp-libs · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp-libs · ol 10 | 2:3.10.3-12.el10_2.14 | ELSA-2026-75570 | Oct 6, 2026 |
| freerdp-libs · ol 8 | 2:2.11.7-14.el8_10 | ELSA-2026-76747 | Oct 6, 2026 |
| freerdp-libs · ol 9 | 2:2.11.7-7.el9_8.8 | ELSA-2026-76755 | Oct 7, 2026 |
| freerdp-libs-debuginfo · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy-modules 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-sdl 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-server · almalinux 10 | 2:3.10.3-12.el10_2.14 | ALSA-2026:75570 | Oct 5, 2026 |
| freerdp-server · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp-server · ol 10 | 2:3.10.3-12.el10_2.14 | ELSA-2026-75570 | Oct 6, 2026 |
| freerdp-server-debuginfo · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| freerdp-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-shadow-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-wayland 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3 · Debian 14 | 3.31.0+dfsg-1 | DEBIAN-CVE-2026-91964 | Sep 17, 2026 |
| freerdp3-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy-modules 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-sdl 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-shadow-x11 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | freerdp3-shadow-x11 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| freerdp3-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-shadow-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-wayland · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | freerdp3-wayland 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| freerdp3-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-wayland 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-x11 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | freerdp3-x11 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| freerdp3-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-client3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-client3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-client3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-client3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-server-proxy3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server-proxy3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-server3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-server3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-server3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow-subsystem3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow-subsystem3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libwinpr · RHEL 8 | 2:2.11.7-14.el8_10 | RHSA-2026:76747 | Oct 6, 2026 |
| libwinpr · RHEL 9 | 2:2.11.7-7.el9_8.8 | RHSA-2026:76755 | Oct 9, 2026 |
| libwinpr · almalinux 10 | 2:3.10.3-12.el10_2.14 | ALSA-2026:75570 | Oct 5, 2026 |
| libwinpr · almalinux 8 | 2:2.11.7-14.el8_10 | ALSA-2026:76747 | Oct 6, 2026 |
| libwinpr · almalinux 9 | 2:2.11.7-7.el9_8.8 | ALSA-2026:76755 | Oct 6, 2026 |
| libwinpr · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| libwinpr · ol 10 | 2:3.10.3-12.el10_2.14 | ELSA-2026-75570 | Oct 6, 2026 |
| libwinpr · ol 8 | 2:2.11.7-14.el8_10 | ELSA-2026-76747 | Oct 6, 2026 |
| libwinpr · ol 9 | 2:2.11.7-7.el9_8.8 | ELSA-2026-76755 | Oct 7, 2026 |
| libwinpr-debuginfo · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| libwinpr-devel · RHEL 8 | 2:2.11.7-14.el8_10 | RHSA-2026:76747 | Oct 6, 2026 |
| libwinpr-devel · RHEL 9 | 2:2.11.7-7.el9_8.8 | RHSA-2026:76755 | Oct 9, 2026 |
| libwinpr-devel · almalinux 10 | 2:3.10.3-12.el10_2.14 | ALSA-2026:75570 | Oct 5, 2026 |
| libwinpr-devel · almalinux 8 | 2:2.11.7-14.el8_10 | ALSA-2026:76747 | Oct 6, 2026 |
| libwinpr-devel · almalinux 9 | 2:2.11.7-7.el9_8.8 | ALSA-2026:76755 | Oct 6, 2026 |
| libwinpr-devel · amzn 2023 | 2:3.31.0-1.amzn2023 | ALAS2023-2026-2142 | Sep 14, 2026 |
| libwinpr-devel · ol 10 | 2:3.10.3-12.el10_2.14 | ELSA-2026-75570 | Oct 6, 2026 |
| libwinpr-devel · ol 8 | 2:2.11.7-14.el8_10 | ELSA-2026-76747 | Oct 6, 2026 |
| libwinpr-devel · ol 9 | 2:2.11.7-7.el9_8.8 | ELSA-2026-76755 | Oct 7, 2026 |
| libwinpr-tools3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libwinpr-tools3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libwinpr-tools3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libwinpr-tools3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libwinpr3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libwinpr3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libwinpr3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libwinpr3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| winpr-utils · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | winpr-utils 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| winpr3-utils · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | winpr3-utils 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| winpr3-utils · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | winpr3-utils 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
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