Double Free in Freerdp
CVE-2026-109943
FreeRDP 3.29.0 before 3.32.0 contains a double free in the client's async-update message proxy, which shallow-copies the parser-owned PolygonSC or PolygonCB points array when numPoints is zero, so both the queue consumer and parser cleanup free it. A malicious RDP server can send a point-bearing polygon order followed by a zero-point order to crash a client with +async-update enabled.
Vulnerability class: Double Free
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-pg3f-chj4-mrw6 (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.29.0-before-3.32.0-double-free-via-async… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109943?
- CVE-2026-109943 is a medium-severity vulnerability in Freerdp, classified under Double Free. CVSS score: 6.5/10. Published 2026-10-13.
- How severe is CVE-2026-109943?
- Medium severity. CVSS v3 base score is 6.5 out of 10.