openimageio — security advisory
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
- Products
- openimageio
- Affected versions
- 2.5.18.0+dfsg-1, 2.5.19.1+dfsg-1, 2.5.19.1+dfsg-2, 3.1.18.0+dfsg-1, 3.1.18.0+dfsg-2, 3.1.18.1+dfsg-1, 3.1.18.1+dfsg-2
- Fixed versions
- 3.1.18.0+dfsg-2
- CVEs
- CVE-2026-43996
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:53 UTC · Revision 1
Source evidence
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
osv:DEBIAN-CVE-2026-43996
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: 3.1.18.0+dfsg-2
Complete source record
{
"id": "71f9135b97dff5e17c62c89603f3a8fcc7ee42be7843dffb3ddc1c4671ac7e83",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-43996",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-43996",
"summary": "OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.",
"evidence": "osv:DEBIAN-CVE-2026-43996",
"products": [
{
"name": {
"value": "openimageio",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.5.18.0+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.5.19.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.5.19.1+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.18.0+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.18.0+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.18.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.18.1+dfsg-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.18.0+dfsg-2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "2.5.18.0+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.5.19.1+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.5.19.1+dfsg-2",
"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-43996",
"aliases": [
"DEBIAN-CVE-2026-43996"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/debian/openimageio?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.5.18.0+dfsg-1",
"2.5.19.1+dfsg-1",
"2.5.19.1+dfsg-2",
"3.1.18.0+dfsg-1",
"3.1.18.0+dfsg-2",
"3.1.18.1+dfsg-1",
"3.1.18.1+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43996.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.18.0+dfsg-2"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/debian/openimageio?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.5.18.0+dfsg-1",
"2.5.19.1+dfsg-1",
"2.5.19.1+dfsg-2",
"3.1.18.0+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43996.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T10:01:25.080448959Z",
"provider": "osv",
"upstream": [
"CVE-2026-43996"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-43996"
]
},
"related_cves": [
{
"value": "CVE-2026-43996",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461443,
"published_at": "2026-05-14T20:17:07.3+00:00"
}