Bug 2520803 (CVE-2026-70651)

Summary:	CVE-2026-70651 libvips: libvips: Denial of Service via integer overflow in multi-page TIFF image processing
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in libvips, an image processing library. When libvips is built without libtiff support but with ImageMagick support, an integer overflow can occur while loading a crafted multi-page Tagged Image File Format (TIFF) image. This overflow, caused by unchecked calculations of image frame height, can lead to a heap buffer over-read and result in a process crash, causing a Denial of Service (DoS).	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Depends On:	2526139, 2526140
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Description OSIDB Bzimport 2026-08-20 21:47:54 UTC

libvips is a fast image processing library with low memory needs. Prior to version 8.18.3, libvips built without libtiff support but with ImageMagick support can overflow the combined frame height while loading a crafted multi-page TIFF through VipsForeignLoadMagick. The vulnerable calculations in libvips/foreign/magick6load.c and libvips/foreign/magick7load.c multiply the per-page Ysize by n_frames without a checked bound, which can cause a heap buffer over-read and process crash. Most package-manager builds include libtiff and do not use this affected fallback path. This issue is fixed in version 8.18.3.