Bug 2520800 (CVE-2026-70654)

Summary:	CVE-2026-70654 libvips: libvips: Heap buffer overflow allows memory corruption and denial of service.
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
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 applications process untrusted uncompressed PPM (Portable Pixmap) images through unusual custom libvips sources, a heap buffer overflow can occur. This vulnerability, located in the vips_source_read_to_memory function, allows a local attacker to write beyond an allocated memory buffer. This can lead to memory corruption or cause the application to crash, resulting in a denial of service.	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:	2526149, 2526150
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Description OSIDB Bzimport 2026-08-20 21:47:50 UTC

libvips is a fast image processing library with low memory needs. Prior to version 8.18.3, applications that define unusual custom libvips sources and use them to process untrusted uncompressed PPM images can trigger a max/min error in vips_source_read_to_memory in libvips/iofuncs/source.c. The function uses VIPS_MAX instead of VIPS_MIN when selecting the remaining read size, allowing up to 4032 bytes to be written beyond the allocated heap buffer and causing memory corruption or a process crash. This issue is fixed in version 8.18.3.