Vulnerability in Freerdp
CVE-2026-91946
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.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91946?
- CVE-2026-91946 is a medium-severity vulnerability in Freerdp, classified under Use of Uninitialized Resource. CVSS score: 6.5/10. Published 2026-09-15.
- How severe is CVE-2026-91946?
- Medium severity. CVSS v3 base score is 6.5 out of 10.