# CVE-2026-121404: freerdp3: FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server that allows authenticated RDP c...

CVE-2026-121404 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-121404, released November 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-121404
- Priority: Routine
- CVSS: 6.5 (moderate)
- EPSS: 0.0038
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 3, 2026

## Description

FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server that allows authenticated RDP clients to spin server threads by sending zero-length drdynvc DATA PDUs. Attackers can send empty DATA messages on opened audin or rdpgfx channels, so that FreeRDP_WTSVirtualChannelRead never consumes them, consuming full CPU cores until disconnect.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | freerdp RHEL 10 | 3.32.2-1.el10_2 | [RHSA-2026:94514](https://patchblox.com/security/data/fix/linux/rhsa-2026-94514.md) | Nov 4, 2026 |
| Linux | freerdp almalinux 10 | 2:3.32.2-1.el10_2 | [ALSA-2026:94514](https://patchblox.com/security/data/fix/linux/alsa-2026-94514.md) | Nov 7, 2026 |
| Linux | freerdp-devel almalinux 10 | 2:3.32.2-1.el10_2 | [ALSA-2026:94514](https://patchblox.com/security/data/fix/linux/alsa-2026-94514.md) | Nov 7, 2026 |
| Linux | freerdp-libs almalinux 10 | 2:3.32.2-1.el10_2 | [ALSA-2026:94514](https://patchblox.com/security/data/fix/linux/alsa-2026-94514.md) | Nov 7, 2026 |
| Linux | freerdp-server almalinux 10 | 2:3.32.2-1.el10_2 | [ALSA-2026:94514](https://patchblox.com/security/data/fix/linux/alsa-2026-94514.md) | Nov 7, 2026 |
| Linux | freerdp3 Debian 14 | 3.32.2+dfsg-1 | [DEBIAN-CVE-2026-121404](https://patchblox.com/security/data/fix/linux/debian-cve-2026-121404.md) | Nov 4, 2026 |
| Linux | libwinpr almalinux 10 | 2:3.32.2-1.el10_2 | [ALSA-2026:94514](https://patchblox.com/security/data/fix/linux/alsa-2026-94514.md) | Nov 7, 2026 |
| Linux | libwinpr-devel almalinux 10 | 2:3.32.2-1.el10_2 | [ALSA-2026:94514](https://patchblox.com/security/data/fix/linux/alsa-2026-94514.md) | Nov 7, 2026 |

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Data as of 2026-11-10T07:50:38Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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