openslide: OpenSlide is a C library for reading whole slide image files
CVE-2026-48977 is fixed in openslide on 1 platform, first by DEBIAN-CVE-2026-48977, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| openslide · Debian 12.15 (bookworm) | 3.4.1+dfsg-6+deb12u1 | DEBIAN-CVE-2026-48977 | Jun 24, 2026 |
| openslide · Debian 13.5 (trixie) | 3.4.1+dfsg-7+deb13u1 | DEBIAN-CVE-2026-48977 | Jun 24, 2026 |
| openslide · Debian 14 | 3.4.1+dfsg-9 | DEBIAN-CVE-2026-48977 | Jun 24, 2026 |
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