CVE-2026-109250 FreeRDP 3.0.0 before 3.32.0 Heap Buffer Overflow via PKCS#11 collect_keys()
Local attackers with smartcard control can trigger heap buffer overflow in FreeRDP during logon, potentially enabling code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-109250?
CVE-2026-109250 is a high-severity memory corruption vulnerability in FreeRDP, published on 12 Oct 2026. It can only be exploited from the same machine or local network, 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 buffer overflow vulnerability in collect_keys() that allows local attackers to write past the fixed 64-entry keys array during PKCS#11 key enumeration. Attackers controlling smartcard tokens can present more than 64 public key objects across multiple slots to corrupt heap memory with attacker-chosen CKA_ID and CKA_LABEL data during smartcard logon.
Weakness: CWE-129
Which versions are affected by CVE-2026-109250?
How do I fix CVE-2026-109250?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-109250 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109250 exists.
Sources
Also known as DEBIAN-CVE-2026-109250, GHSA-jhv5-m83m-hxhq, GHSA-q5vf-vw79-qr24, UBUNTU-CVE-2026-109250.