High
openslide — security advisory
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.
- Products
- openslide
- Affected versions
- 3.4.0-1build1, 3.4.1+dfsg-2, 3.4.1+dfsg-4, 3.4.1+dfsg-5, 3.4.1+dfsg-5build1, 3.4.1+dfsg-6build1, 3.4.1+dfsg-7, 3.4.1+dfsg-7build1, 3.4.1+dfsg-7build2, 3.4.1+dfsg-7build3, 3.4.1+dfsg-7build4, 3.4.1+dfsg-9
- Fixed versions
- Not specified
- CVEs
- CVE-2026-48977
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:50 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-48977
openslide
Fixed versions: Not specified
openslide
Fixed versions: Not specified
openslide
Fixed versions: Not specified
openslide
Fixed versions: Not specified
openslide
Fixed versions: Not specified
openslide
Fixed versions: Not specified
openslide
Fixed versions: Not specified
openslide
Fixed versions: Not specified
Complete source record
{
"id": "65efc5e55ffa1dd25edf5290a4100ebc10c4bc026c831443ad0cf1d9bc8599cb",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-48977",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-48977",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-48977",
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],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-48977",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "Ubuntu",
"score": "medium"
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"affected": [
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},
"versions": [
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"package": {
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"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
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],
"database_specific": {
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],
"modified": "2026-10-17T12:56:06.717791923Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-48977",
"https://www.cve.org/CVERecord?id=CVE-2026-48977",
"https://github.com/openslide/openslide/security/advisories/GHSA-mxg2-48g7-fmwc"
]
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"value": "CVE-2026-48977",
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"source_id": "core-osv",
"document_id": 354832,
"published_at": "2026-09-17T21:17:00+00:00"
}