CVE-2026-48977 OpenSlide: Arbitrary memory write with crafted Ventana BIF file
OpenSlide library allows arbitrary memory write via crafted Ventana BIF files, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48977?
CVE-2026-48977 is a high-severity memory corruption vulnerability in openslide, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-48977?
Linux distribution packages (1)
openslide openSUSE:Tumbleweed | All versions | 4.0.1-1.1 |
How do I fix CVE-2026-48977?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-48977 being exploited?
There is no known exploitation of CVE-2026-48977 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-48977, GHSA-mxg2-48g7-fmwc, MGASA-2026-0328, UBUNTU-CVE-2026-48977, openSUSE-SU-2026:11707-1.