CVE-2026-91947
Fixed in a distro release EPSS <1%CVSS 7.5
FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.
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 |
| 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 |
| Rocky Linux 10 | freerdp | 2:3.10.3-12.el10_2.14 |
| 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 |