CVE-2026-112277

Name	CVE-2026-112277
Description	rdesktop through 1.9.0 contains a heap out-of-bounds read vulnerability in process_plane() in bitmap.c that allows malicious RDP servers to crash clients by sending malformed 32 bpp compressed bitmaps. Attackers can declare a large bitmap geometry with a short compressed body in bitmap update PDUs or bitmap cache orders, causing unbounded reads past the receive buffer and denial of service.
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
rdesktop (PTS)	bookworm, trixie	1.9.0-2	vulnerable
	forky, sid	1.9.1-1	vulnerable

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

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

https://github.com/rdesktop/rdesktop/issues/436
https://github.com/rdesktop/rdesktop/pull/437
Crash in GUI tool, no security impact