CVE-2026-109945 FreeRDP 3.0.0 before 3.32.0 Smartcard Use-After-Free via Concurrent Disconnect and Transmit
A malicious RDP server can trigger a heap use-after-free in FreeRDP smartcard emulation, causing client process termination.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-109945?
CVE-2026-109945 is a medium-severity use after free vulnerability in Freerdp Freerdp, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
FreeRDP 3.0.0 before 3.32.0 contains a heap use-after-free vulnerability in smartcard emulation when SCARD_IOCTL_DISCONNECT and SCARD_IOCTL_TRANSMIT operate concurrently on one card handle. A malicious RDP server can overlap these IRPs through separate context workers to free and reuse the SCardHandle, causing client-process heap corruption and termination.
Weakness: CWE-362
Which versions are affected by CVE-2026-109945?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-109945?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-109945 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109945 exists.
Other vulnerabilities in Freerdp Freerdp
- CVE-2021-37594 Other in n/a
- CVE-2021-37595 Other in n/a
- CVE-2026-67305 FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
- CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
Sources
Also known as DEBIAN-CVE-2026-109945, GHSA-8rpr-jjjg-5qv6, GHSA-f55c-wf6q-wcjx, UBUNTU-CVE-2026-109945.