CVE-2026-48977

OpenSlide: Arbitrary memory write with crafted Ventana BIF file

State: Published
Severity: 7.7 High
Published: Sep 17, 2026
Updated: Sep 18, 2026
Reserved: May 26, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	7.7 High	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-123 Write-what-where Condition
CWE-823 Use of Out-of-range Pointer Offset
CWE-1284 Improper Validation of Specified Quantity in Input

Affected Products

Product	Versions
openslideopenslide	>= 3.4.1, < 4.0.1Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.