Bug 2400373 (CVE-2025-59933)

Summary: CVE-2025-59933 libvips: libvips Buffer Over-Read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A buffer over read flaw has been discovered in libvips. Those using libvips compiled with support for PDF input via poppler, the `pdfload` operation is affected by a buffer read overflow when parsing the header of a crafted PDF with a page that defines a width but not a height. Processing of such an image halts very shortly after the buffer read overflow, and no output is generated. It is not possible for a consuming application to access the memory area overflowed. Those using libvips compiled without support for PDF input are unaffected.Those using libvips compiled with support for PDF input via PDFium are unaffected.
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Bug Depends On: 2401081    
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Description OSIDB Bzimport 2025-09-29 23:01:37 UTC 
libvips is a demand-driven, horizontally threaded image processing library. For versions 8.17.1 and below, when libvips is compiled with support for PDF input via poppler, the pdfload operation is affected by a buffer read overflow when parsing the header of a crafted PDF with a page that defines a width but not a height. Those using libvips compiled without support for PDF input are unaffected as well as thosewith support for PDF input via PDFium. This issue is fixed in version 8.17.2. A workaround for those affected is to block the VipsForeignLoadPdf operation via vips_operation_block_set, which is available in most language bindings, or to set VIPS_BLOCK_UNTRUSTED environment variable at runtime, which will block all untrusted loaders including PDF input via poppler.