CVE-2026-33516

Name	CVE-2026-33516
Description	xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
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
xrdp (PTS)	bullseye	0.9.21.1-1~deb11u1	vulnerable
	bullseye (security)	0.9.21.1-1~deb11u3	vulnerable
	bookworm	0.9.21.1-1+deb12u1	vulnerable
	bookworm (security)	0.9.21.1-1+deb12u2	vulnerable
	trixie (security), trixie	0.10.1-3.1+deb13u1	vulnerable
	forky, sid	0.10.5-5	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
xrdp	source	(unstable)	(unfixed)

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7