CVE-2026-48977

Name	CVE-2026-48977
Description	OpenSlide is a C library for reading whole slide image files. From 3.4.1 until 4.0.1, OpenSlide's parse_level0_xml() processing in src/openslide-vendor-ventana.c accepts nonpositive row or column tile counts from a crafted Ventana BIF file. The invalid counts produce attacker-controlled relative memory offsets and allow arbitrary values to be written at those offsets, affecting all supported platforms and configurations and resulting in a crash or potential arbitrary code execution. This issue is fixed in version 4.0.1.
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	1140003

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openslide (PTS)	bookworm	3.4.1+dfsg-6+deb12u1	fixed
	trixie	3.4.1+dfsg-7+deb13u1	fixed
	forky, sid	4.0.1+dfsg-2	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
openslide	source	bookworm	3.4.1+dfsg-6+deb12u1
openslide	source	trixie	3.4.1+dfsg-7+deb13u1
openslide	source	(unstable)	3.4.1+dfsg-9	1140003

Notes

[bullseye] - openslide <postponed> (Minor issue; can be fixed in next update)
https://github.com/openslide/openslide/security/advisories/GHSA-mxg2-48g7-fmwc