Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck
CVE-2026-91957FreeRDP before 3.31.0 Use-After-Free via smartcard worker
Low 3.1
In plain English
A low-severity use-after-free in FreeRDP from FreeRDP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FreeRDP before 3.31.0 contains a use-after-free vulnerability in the smartcard RDPDR device handler when worker thread creation fails after device registration. Attackers can trigger thread creation failure during channel setup to cause device pointer deallocation while devman retains a reference, leading to crash or code execution.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-91957 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-91957 |
| Debian:14 | freerdp3 | 3.31.0+dfsg-1 | DEBIAN-CVE-2026-91957 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-91957 |
| Ubuntu:24.04:LTS | freerdp3 | 3.31.0+dfsg-0ubuntu0.24.04.1 | UBUNTU-CVE-2026-91957 |
| Ubuntu:26.04:LTS | freerdp3 | 3.31.0+dfsg-0ubuntu0.26.04.1 | UBUNTU-CVE-2026-91957 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- GitHub Security Advisory (GHSA-j5mq-3349-gwmm) vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.31.0 Use-After-Free via smartcard worker third-party-advisory