CVE-2026-121395

Medium

Description

FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the RemoteFX differential decoder when verbose WinPR assertions are enabled. A malicious RDP server can send a crafted RemoteFX tile with adjacent LL3 coefficients summing beyond signed 16-bit range to abort the client process.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreerdp

PublishedNov 3, 2026

First seenNov 4, 2026

Weakness typeCWE-617CWE-617

How to fix

Update

freerdp freerdp3.32.2 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cg4f-57hc-v7w7

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	3.17.0 ≤ v < 3.32.2	3.32.2

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