Medium
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
- 1.5.17~dfsg0-1ubuntu2, 1.5.20~dfsg0-1ubuntu2, 1.5.23~dfsg0-1ubuntu1, 1.6.10~dfsg0-1ubuntu1, 1.6.10~dfsg0-2ubuntu1, 1.6.11~dfsg0-1ubuntu1, 1.6.11~dfsg0-1ubuntu1+esm2, 1.6.17~dfsg0-1ubuntu5, 1.6.9~dfsg0-4ubuntu1, 1.7.17~dfsg0-1ubuntu2, 1.7.17~dfsg0-1ubuntu2+esm1, 2.0.10~dfsg0-1, 2.0.11~dfsg0-1, 2.0.12~dfsg0-1, 2.0.12~dfsg0-1build1, 2.0.12~dfsg0-1build2, 2.1.10.1~dfsg0-5ubuntu4, 2.1.10.1~dfsg0-5ubuntu5, 2.1.12.0~dfsg0-1, 2.1.12.0~dfsg0-1ubuntu0.1~esm1, 2.2.10.1+dfsg-1build1, 2.2.18.0+dfsg-1, 2.2.18.0+dfsg-1build2, 2.2.18.0+dfsg-1ubuntu2, 2.4.14.0+dfsg-1, 2.4.16.0+dfsg-1, 2.4.16.0+dfsg-1build1, 2.4.17.0+dfsg-1, 2.4.17.0+dfsg-1.1build3, 2.4.17.0+dfsg-1.1build4, 2.4.17.0+dfsg-1.1ubuntu0.1~esm1, 2.4.17.0+dfsg-1build1, 2.5.18.0+dfsg-1build1, 2.5.18.0+dfsg-1build2, 2.5.19.1+dfsg-1build1, 2.5.19.1+dfsg-1build3, 2.5.19.1+dfsg-1build5, 2.5.19.1+dfsg-2, 2.5.19.1+dfsg-2build1, 2.5.19.1+dfsg-2build2, 2.5.19.1+dfsg-2ubuntu0.1~esm1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-43996
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:04 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:UBUNTU-CVE-2026-43996
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: Not specified
openimageio
Fixed versions: Not specified
Complete source record
{
"id": "02e6db51a2f054bb2f2f136434388e4f9c7decd72ca163dd3c616303b52bccc8",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-43996",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-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:UBUNTU-CVE-2026-43996",
"products": [
{
"name": {
"value": "openimageio",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.5.17~dfsg0-1ubuntu2",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.20~dfsg0-1ubuntu2",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.23~dfsg0-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.9~dfsg0-4ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.10~dfsg0-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.10~dfsg0-2ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.11~dfsg0-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.11~dfsg0-1ubuntu1+esm2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.6.17~dfsg0-1ubuntu5",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.17~dfsg0-1ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.17~dfsg0-1ubuntu2+esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.10~dfsg0-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.11~dfsg0-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.12~dfsg0-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.12~dfsg0-1build1",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.12~dfsg0-1build2",
"evidence": "/affected/2/versions"
},
{
"value": "2.1.10.1~dfsg0-5ubuntu4",
"evidence": "/affected/2/versions"
},
{
"value": "2.1.10.1~dfsg0-5ubuntu5",
"evidence": "/affected/2/versions"
},
{
"value": "2.1.12.0~dfsg0-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.1.12.0~dfsg0-1ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.10.1+dfsg-1build1",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.18.0+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.18.0+dfsg-1build2",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.18.0+dfsg-1ubuntu2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.4.14.0+dfsg-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.16.0+dfsg-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.16.0+dfsg-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.17.0+dfsg-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.17.0+dfsg-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.17.0+dfsg-1.1build3",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.17.0+dfsg-1.1build4",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.17.0+dfsg-1.1ubuntu0.1~esm1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.5.18.0+dfsg-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "2.5.18.0+dfsg-1build2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.5.19.1+dfsg-2",
"evidence": "/affected/6/versions"
},
{
"value": "2.5.19.1+dfsg-2build1",
"evidence": "/affected/6/versions"
},
{
"value": "2.5.19.1+dfsg-2build2",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "openimageio",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.5.18.0+dfsg-1build2",
"evidence": "/affected/7/versions"
},
{
"value": "2.5.19.1+dfsg-1build1",
"evidence": "/affected/7/versions"
},
{
"value": "2.5.19.1+dfsg-1build3",
"evidence": "/affected/7/versions"
},
{
"value": "2.5.19.1+dfsg-1build5",
"evidence": "/affected/7/versions"
},
{
"value": "2.5.19.1+dfsg-2",
"evidence": "/affected/7/versions"
},
{
"value": "2.5.19.1+dfsg-2ubuntu0.1~esm1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-43996",
"aliases": [
"UBUNTU-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"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.5.17~dfsg0-1ubuntu2",
"1.5.20~dfsg0-1ubuntu2",
"1.5.23~dfsg0-1ubuntu1",
"1.6.9~dfsg0-4ubuntu1",
"1.6.10~dfsg0-1ubuntu1",
"1.6.10~dfsg0-2ubuntu1",
"1.6.11~dfsg0-1ubuntu1",
"1.6.11~dfsg0-1ubuntu1+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio1.6",
"binary_version": "1.6.11~dfsg0-1ubuntu1+esm2"
},
{
"binary_name": "openimageio-tools",
"binary_version": "1.6.11~dfsg0-1ubuntu1+esm2"
},
{
"binary_name": "python-openimageio",
"binary_version": "1.6.11~dfsg0-1ubuntu1+esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.6.17~dfsg0-1ubuntu5",
"1.7.17~dfsg0-1ubuntu2",
"1.7.17~dfsg0-1ubuntu2+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio1.7",
"binary_version": "1.7.17~dfsg0-1ubuntu2+esm1"
},
{
"binary_name": "openimageio-tools",
"binary_version": "1.7.17~dfsg0-1ubuntu2+esm1"
},
{
"binary_name": "python-openimageio",
"binary_version": "1.7.17~dfsg0-1ubuntu2+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"2.0.10~dfsg0-1",
"2.0.11~dfsg0-1",
"2.0.12~dfsg0-1",
"2.0.12~dfsg0-1build1",
"2.0.12~dfsg0-1build2",
"2.1.10.1~dfsg0-5ubuntu4",
"2.1.10.1~dfsg0-5ubuntu5",
"2.1.12.0~dfsg0-1",
"2.1.12.0~dfsg0-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio2.1",
"binary_version": "2.1.12.0~dfsg0-1ubuntu0.1~esm1"
},
{
"binary_name": "openimageio-tools",
"binary_version": "2.1.12.0~dfsg0-1ubuntu0.1~esm1"
},
{
"binary_name": "python3-openimageio",
"binary_version": "2.1.12.0~dfsg0-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.2.10.1+dfsg-1build1",
"2.2.18.0+dfsg-1",
"2.2.18.0+dfsg-1build2",
"2.2.18.0+dfsg-1ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio2.2",
"binary_version": "2.2.18.0+dfsg-1ubuntu2"
},
{
"binary_name": "openimageio-tools",
"binary_version": "2.2.18.0+dfsg-1ubuntu2"
},
{
"binary_name": "python3-openimageio",
"binary_version": "2.2.18.0+dfsg-1ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"versions": [
"2.4.14.0+dfsg-1",
"2.4.16.0+dfsg-1",
"2.4.16.0+dfsg-1build1",
"2.4.17.0+dfsg-1",
"2.4.17.0+dfsg-1build1",
"2.4.17.0+dfsg-1.1build3",
"2.4.17.0+dfsg-1.1build4",
"2.4.17.0+dfsg-1.1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio2.4t64",
"binary_version": "2.4.17.0+dfsg-1.1ubuntu0.1~esm1"
},
{
"binary_name": "openimageio-tools",
"binary_version": "2.4.17.0+dfsg-1.1ubuntu0.1~esm1"
},
{
"binary_name": "python3-openimageio",
"binary_version": "2.4.17.0+dfsg-1.1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"2.5.18.0+dfsg-1build1",
"2.5.18.0+dfsg-1build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio2.5",
"binary_version": "2.5.18.0+dfsg-1build2"
},
{
"binary_name": "openimageio-tools",
"binary_version": "2.5.18.0+dfsg-1build2"
},
{
"binary_name": "python3-openimageio",
"binary_version": "2.5.18.0+dfsg-1build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.5.19.1+dfsg-2",
"2.5.19.1+dfsg-2build1",
"2.5.19.1+dfsg-2build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio2.5",
"binary_version": "2.5.19.1+dfsg-2build2"
},
{
"binary_name": "openimageio-tools",
"binary_version": "2.5.19.1+dfsg-2build2"
},
{
"binary_name": "python3-openimageio",
"binary_version": "2.5.19.1+dfsg-2build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openimageio",
"purl": "pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Fresolute",
"ecosystem": "Ubuntu:Pro:26.04:LTS"
},
"versions": [
"2.5.18.0+dfsg-1build2",
"2.5.19.1+dfsg-1build1",
"2.5.19.1+dfsg-1build3",
"2.5.19.1+dfsg-1build5",
"2.5.19.1+dfsg-2",
"2.5.19.1+dfsg-2ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43996.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopenimageio2.5",
"binary_version": "2.5.19.1+dfsg-2ubuntu0.1~esm1"
},
{
"binary_name": "openimageio-tools",
"binary_version": "2.5.19.1+dfsg-2ubuntu0.1~esm1"
},
{
"binary_name": "python3-openimageio",
"binary_version": "2.5.19.1+dfsg-2ubuntu0.1~esm1"
}
]
}
}
],
"modified": "2026-10-17T13:00:07.232325422Z",
"provider": "osv",
"upstream": [
"CVE-2026-43996"
],
"references": [
"https://ubuntu.com/security/CVE-2026-43996",
"https://www.cve.org/CVERecord?id=CVE-2026-43996",
"https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55"
]
},
"related_cves": [
{
"value": "CVE-2026-43996",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360330,
"published_at": "2026-05-14T20:17:00+00:00"
}