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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (44.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-r7jx-j9h7-j4xj (vendor-advisory, Vendor Advisory)
- github.com/FreeRDP/FreeRDP/commit/483c9388119f06bac420d92053cff9ef94e83bea (Patch, patch)
- www.vulncheck.com/advisories/freerdp-before-3.31.0-information-disclosure-via-r… (Patch, Third Party Advisory, 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.