Vulnerability in Freerdp
CVE-2026-109946
FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even before YUV444 conversion, so an odd width reaches an assertion and aborts the client. A malicious or compromised RDP server can terminate a connected FreeRDP client after RDPGFX AVC444 negotiation by sending an in-bounds region rectangle with an odd width.
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97pf-pwp3-2wrv (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.11.0-before-3.32.0-reachable-assertion-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109946?
- CVE-2026-109946 is a medium-severity vulnerability in Freerdp, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-10-13.
- How severe is CVE-2026-109946?
- Medium severity. CVSS v3 base score is 6.5 out of 10.