CVE-2026-91960

Name	CVE-2026-91960
Description	FreeRDP versions before 3.31.0 contain an integer overflow in WinPR's Stream_EnsureRemainingCapacity function that allows remote attackers to cause denial of service. A malicious RD Gateway peer can send a WebSocket Ping frame with a crafted 64-bit extended payload length to trigger integer wraparound, resulting in a double free that crashes the FreeRDP client during connection.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
freerdp2 (PTS)	bookworm	2.11.7+dfsg1-6~deb12u1	fixed
freerdp3 (PTS)	trixie	3.15.0+dfsg-2.1+deb13u3	fixed
	forky, sid	3.31.1+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
freerdp2	source	(unstable)	(not affected)
freerdp3	source	trixie	(not affected)
freerdp3	source	(unstable)	3.31.0+dfsg-1

Notes

[trixie] - freerdp3 <not-affected> (Incomplete fix for CVE-2026-27951 never backported)
- freerdp2 <not-affected> (Incomplete fix for CVE-2026-27951 never backported)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vccg-35r5-8jrf