CVE-2025-29769

Name	CVE-2025-29769
Description	libvips is a demand-driven, horizontally threaded image processing library. The heifsave operation could incorrectly determine the presence of an alpha channel in an input when it was not possible to determine the colour interpretation, known internally within libvips as "multiband". There aren't many ways to create a "multiband" input, but it is possible with a well-crafted TIFF image. If a "multiband" TIFF input image had 4 channels and HEIF-based output was requested, this led to libvips creating a 3 channel HEIF image without an alpha channel but then attempting to write 4 channels of data. This caused a heap buffer overflow, which could crash the process. This vulnerability is fixed in 8.16.1.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, 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
vips (PTS)	bullseye	8.10.5-2	vulnerable
	bookworm	8.14.1-3+deb12u1	vulnerable
	sid, trixie	8.16.1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
vips	source	(unstable)	8.16.1-1

Notes

https://github.com/libvips/libvips/security/advisories/GHSA-f8r8-43hh-rghm
https://github.com/libvips/libvips/pull/4392
https://github.com/libvips/libvips/commit/9ab6784f693de50b00fa535b9efbbe9d2cbf71f2 (v8.16.1)
Follow-up: https://github.com/libvips/libvips/pull/4394
https://github.com/libvips/libvips/commit/8effeb9120ac7e9214973c60d44b98d775749b39 (v8.17.0-test2)
https://issues.oss-fuzz.com/issues/396460413