# CVE-2026-85089: freerdp3: FreeRDP versions 3.0.0 through 3.30.0 (before 3.31.0) transmit uninitialized heap memory in Save Session Info PDU res...

CVE-2026-85089 is fixed in 34 products on 1 platform, first by DEBIAN-CVE-2026-85089, released September 4, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-85089
- Priority: High
- CVSS: 8.8 (Medium)
- EPSS: 0.0038
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 3, 2026

## Description

FreeRDP versions 3.0.0 through 3.30.0 (before 3.31.0) transmit uninitialized heap memory in Save Session Info PDU reserved padding fields. Three PDU writers in libfreerdp/core/info.c (rdp_write_logon_info_v2, rdp_write_logon_info_plain, and rdp_write_logon_info_ex) use Stream_Seek instead of Stream_Zero for reserved pad bytes (up to 576 bytes), leaving previously freed heap contents in the outgoing PDU. Because the send buffer is allocated with malloc (not zeroed), stale heap data — which may include cleartext credentials from prior sessions — can be sent to the receiving peer. FreeRDP-based servers using rdpUpdate::SaveSessionInfo and freerdp-proxy (which forwards these PDUs) are affected, allowing disclosure of server/proxy process memory to a downstream client.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | freerdp RHEL 10 | 3.10.3-12.el10_2.14 | [RHSA-2026:75570](https://patchblox.com/security/data/fix/linux/rhsa-2026-75570.md) | Oct 5, 2026 |
| Linux | freerdp almalinux 10 | 2:3.10.3-12.el10_2.14 | [ALSA-2026:75570](https://patchblox.com/security/data/fix/linux/alsa-2026-75570.md) | Oct 5, 2026 |
| Linux | freerdp amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | freerdp ol 10 | 2:3.10.3-12.el10_2.14 | [ELSA-2026-75570](https://patchblox.com/security/data/fix/linux/elsa-2026-75570.md) | Oct 6, 2026 |
| Linux | freerdp rocky 10 | 2:3.10.3-12.el10_2.14 | [RLSA-2026:75570](https://patchblox.com/security/data/fix/linux/rlsa-2026-75570.md) | Oct 6, 2026 |
| Linux | freerdp-debuginfo amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | freerdp-debugsource amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | freerdp-devel almalinux 10 | 2:3.10.3-12.el10_2.14 | [ALSA-2026:75570](https://patchblox.com/security/data/fix/linux/alsa-2026-75570.md) | Oct 5, 2026 |
| Linux | freerdp-devel amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | freerdp-devel ol 10 | 2:3.10.3-12.el10_2.14 | [ELSA-2026-75570](https://patchblox.com/security/data/fix/linux/elsa-2026-75570.md) | Oct 6, 2026 |
| Linux | freerdp-libs almalinux 10 | 2:3.10.3-12.el10_2.14 | [ALSA-2026:75570](https://patchblox.com/security/data/fix/linux/alsa-2026-75570.md) | Oct 5, 2026 |
| Linux | freerdp-libs amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | freerdp-libs ol 10 | 2:3.10.3-12.el10_2.14 | [ELSA-2026-75570](https://patchblox.com/security/data/fix/linux/elsa-2026-75570.md) | Oct 6, 2026 |
| Linux | freerdp-libs-debuginfo amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-proxy-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-proxy-modules-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-sdl-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | freerdp-server almalinux 10 | 2:3.10.3-12.el10_2.14 | [ALSA-2026:75570](https://patchblox.com/security/data/fix/linux/alsa-2026-75570.md) | Oct 5, 2026 |
| Linux | freerdp-server amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | freerdp-server ol 10 | 2:3.10.3-12.el10_2.14 | [ELSA-2026-75570](https://patchblox.com/security/data/fix/linux/elsa-2026-75570.md) | Oct 6, 2026 |
| Linux | freerdp-server-debuginfo amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-shadow-x11-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-wayland-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-x11-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | freerdp3 Debian 14 | 3.31.0+dfsg-1 | [DEBIAN-CVE-2026-85089](https://patchblox.com/security/data/fix/linux/debian-cve-2026-85089.md) | Sep 4, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-proxy-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-proxy-modules-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-sdl-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-shadow-x11-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-shadow-x11-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-wayland-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-wayland-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-x11-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-x11-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-client3-3-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-client3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-server-proxy3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-server3-3-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-server3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow-subsystem3-3-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-shadow-subsystem3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow3-3-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-shadow3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp3-3-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | libwinpr almalinux 10 | 2:3.10.3-12.el10_2.14 | [ALSA-2026:75570](https://patchblox.com/security/data/fix/linux/alsa-2026-75570.md) | Oct 5, 2026 |
| Linux | libwinpr amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | libwinpr ol 10 | 2:3.10.3-12.el10_2.14 | [ELSA-2026-75570](https://patchblox.com/security/data/fix/linux/elsa-2026-75570.md) | Oct 6, 2026 |
| Linux | libwinpr-debuginfo amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | libwinpr-devel almalinux 10 | 2:3.10.3-12.el10_2.14 | [ALSA-2026:75570](https://patchblox.com/security/data/fix/linux/alsa-2026-75570.md) | Oct 5, 2026 |
| Linux | libwinpr-devel amzn 2023 | 2:3.31.0-1.amzn2023 | [ALAS2023-2026-2142](https://patchblox.com/security/data/fix/linux/alas2023-2026-2142.md) | Sep 14, 2026 |
| Linux | libwinpr-devel ol 10 | 2:3.10.3-12.el10_2.14 | [ELSA-2026-75570](https://patchblox.com/security/data/fix/linux/elsa-2026-75570.md) | Oct 6, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr-tools3-3-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwinpr-tools3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr3-3-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwinpr3-3-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-winpr-utils-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-winpr3-utils-3.31.0-dfsg-0ubuntu0.24.04.1.md) | Sep 14, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-winpr3-utils-3.31.0-dfsg-0ubuntu0.26.04.1.md) | Sep 15, 2026 |

---

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