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CVE-2026-109943: FreeRDP 3.29.0 before 3.32.0 Double Free via Async-Update Polygon Order

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-13 · updated 2026-10-26
• Weakness: CWE-415

Description

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.

Affected products

• FreeRDP: from 3.29.0 before 3.32.0 — fixed in 3.32.0
• FreeRDP: from 3.29.0 before 3.32.0 — fixed in 3.32.0

How to fix

Upgrade to a fixed version: FreeRDP 3.32.0; FreeRDP 3.32.0. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pg3f-chj4-mrw6
• https://www.vulncheck.com/advisories/freerdp-3.29.0-before-3.32.0-double-free-via-async-update-polygon-order

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