CVE-2026-91946 FreeRDP before 3.31.0 Information Disclosure via RDPGFX ResetGraphics
Attackers can read uninitialized heap memory via RDPGFX ResetGraphics, leaking pointers and defeating ASLR in FreeRDP.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-91946?
CVE-2026-91946 is a high-severity vulnerability in Freerdp Freerdp, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FreeRDP versions before 3.31.0 contain an information disclosure vulnerability in the RDPGFX server's ResetGraphics PDU serializer that fails to initialize padding bytes in the fixed 340-byte wire format. Attackers can receive uninitialized heap memory including live pointers and GLib function addresses transmitted in the PDU, defeating heap ASLR and disclosing the GLib module base address.
Weakness: CWE-908
Which versions are affected by CVE-2026-91946?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-91946?
Upgrade to a fixed version.
Is CVE-2026-91946 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91946 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-2026-91946, GHSA-gw8v-xq42-vg69, GHSA-r7jx-j9h7-j4xj, UBUNTU-CVE-2026-91946.