CVE-2026-5442

Name	CVE-2026-5442
Description	A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.
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)
Debian Bugs	1133182

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
orthanc (PTS)	bullseye	1.9.2+really1.9.1+dfsg-1+deb11u1	vulnerable
	bullseye (security)	1.9.2+really1.9.1+dfsg-1+deb11u2	vulnerable
	bookworm, bookworm (security)	1.10.1+dfsg-2+deb12u1	vulnerable
	trixie	1.12.7+dfsg-4	vulnerable
	forky	1.12.11+dfsg-4	fixed
	sid	1.12.11+dfsg-6	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
orthanc	source	(unstable)	1.12.10+dfsg-4			1133182

https://kb.cert.org/vuls/id/536588
https://orthanc.uclouvain.be/hg/orthanc/rev/5ce108190752