Bug 2538592 (CVE-2026-48977)

Summary: CVE-2026-48977 openslide: OpenSlide: Arbitrary code execution via crafted Ventana BIF file
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenSlide, a C library for reading whole slide image files. A remote attacker could exploit a vulnerability in the `parse_level0_xml()` function by providing a specially crafted Ventana BIF file with nonpositive row or column tile counts. This manipulation leads to attacker-controlled memory offsets, allowing arbitrary values to be written at those locations. Successful exploitation could result in a system crash or potentially enable arbitrary code execution.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2539346, 2539347    
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Description OSIDB Bzimport 2026-09-22 19:40:56 UTC
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.