CVE-2026-63638

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Source
https://cve.org/CVERecord?id=CVE-2026-63638
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63638.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-63638
Aliases
  • GHSA-9hxv-jvgr-3x8g
Downstream
Related
Published
2026-09-18T15:47:53Z
Modified
2026-09-20T14:13:50Z
Severity
  • 8.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H CVSS Calculator
Summary
OpenImageIO: Cineon invalid bit depth heap out-of-bounds write
Details

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A crafted cineon image can declare unsupported component bit depth 26. cineoninput::open() maps it to a 32-bit imagespec, but libcineon maps the unsupported depth to an 8-byte value, so cineoninput::read_native_scanline() causes attacker-controlled data to be written beyond the 4-byte-per-pixel caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), CineonInput::read_native_scanline(), ComponentDataSize(), bit depth 26, and ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63638.json"
}
References

Affected packages

Git / github.com/academysoftwarefoundation/openimageio

Affected ranges

Type
GIT
Repo
https://github.com/academysoftwarefoundation/openimageio
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Introduced
a0940a9f1e4a8ff20edc9d550a4dea4723d1aa58
Fixed
710eeafcf7cd75fbfd5e34387ee4c373aa875356
Fixed
f3f12ab761fbccaa644937780e7246674033c407
Fixed
45414c1aedcd3cc98244b4c5802ec53e91976f70
Fixed
6f2b2e85b3b3933ccc5a46303d5535f99bfa39fb
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.0.21.0"
        },
        {
            "introduced": "3.1.0.0"
        },
        {
            "fixed": "3.1.16.0"
        },
        {
            "introduced": "3.2.0.0-dev"
        },
        {
            "fixed": "3.2.0.3-beta1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

Arnold-3.*
Arnold-3.4.72.0
Release-0.*
Release-0.10.0
Release-1.*
Release-1.0.0
Release-1.0.1
Release-1.1.0
Release-1.1.0-beta1
Release-1.1.0-beta2
Release-1.1.0-beta3
Release-1.1.0-beta4
Release-1.1.1
Release-1.3.0-dev
Release-1.3.1-dev
Release-1.3.2-dev
Release-1.3.3-dev
Release-1.3.4-dev
Release-1.3.5
Release-1.3.5-dev
Release-1.3.6-dev
Release-1.4.1dev
Release-1.4.2dev
Release-1.4.3dev
Release-1.4.4dev
Release-1.4.5dev
Release-1.4.6RC1
Release-1.5.0dev
Release-1.5.1dev
Release-1.5.2dev
Release-1.5.3dev
Release-1.5.4dev-pre-SIMD
Release-1.5.5dev
Release-1.5.6dev
Release-1.5.7dev
Release-1.6.1dev
Release-1.6.2dev
Release-1.6.3dev
Release-1.6.4dev
Release-1.6.6beta
Release-1.7.0dev
Release-1.7.1dev
Release-1.7.2dev
Release-1.7.3dev
Release-1.7.4dev
Release-1.7.5beta
Release-1.7.6RC1
Release-1.8.0dev
Release-1.8.1dev
Release-1.8.2dev
Release-1.8.3dev
Release-1.8.4dev
Release-1.9.1dev
Release-1.9.2dev
Release-1.9.3dev
Release-1.9.4dev
Release-2.*
Release-2.0.0-beta1
Release-2.0.1-RC1
Release-2.1.0-dev
Release-2.1.1-dev
Release-2.1.2-dev
Release-2.1.3-dev
Release-2.1.4.0-dev
Release-2.1.5.0-dev
Release-2.1.7-beta
Release-2.1.8.0-RC1
Release-2.2.0.0-dev
Release-2.2.1.0-dev
Release-2.2.1.1-dev
Release-2.2.2.0-dev
Release-2.2.3.0-dev
Release-2.3.0.0-dev
Release-2.3.1.0-dev
Release-2.3.2.0-dev
Release-2.3.3.0-dev
Release-2.3.4.0-dev
arnold-3.*
arnold-3.4.71.0
spi-Arn3.*
spi-Arn3.4.71.0
spi-Arn3.4.72.0
spi-Arn3.4.73.6
spi-Arn3.4.73.7
spi-Arn3.5.0.0
spi-Arn3.5.10.0
spi-Arn3.5.11.0
spi-Arn3.5.12.0
spi-Arn3.5.13.1
spi-Arn3.5.14.0
spi-Arn3.5.16.0
spi-Arn3.5.2.0
spi-Arn3.5.24.0
spi-Arn3.5.25.0
spi-Arn3.5.26.0
spi-Arn3.5.28.0
spi-Arn3.5.31.0
spi-Arn3.5.35.0
spi-Arn3.5.37.0
spi-Arn3.5.41.0
spi-Arn3.5.45.0
spi-Arn3.5.45.1
spi-Arn3.5.48.0
spi-Arn3.5.5.0
spi-Arn3.5.50.0
spi-Arn3.5.66.0
spi-Arn3.5.68.0
spi-Arn3.5.75.0
spi-Arn3.5.8.0
spi-Arn3.5.82.0
spi-Arn3.5.90.0
spi-Arn3.5.91.0
spi-Arn3.5.93.10
spi-Arn3.6.18.0
spi-Arn3.6.21.3
spi-Arn3.6.27.0
spi-Arn3.6.33.4
spi-Arn3.6.36.0
spi-Arn3.6.64.6
spi-Arn3.6.69.3
spi-Arn3.6.7.1
spi-Arn3.6.72.1
spi-Arn3.7.23.3
spi-Arn3.7.25.0
spi-Arn3.7.42.0
Other
spi-SpComp2-v20
spi-SpComp2-v9
spi-spcomp2-release-38.*
spi-spcomp2-release-38.0
spi-spcomp2-release-39.*
spi-spcomp2-release-39.1
spi-spcomp2-release-41.*
spi-spcomp2-release-41.0
spi-spcomp2-release-42.*
spi-spcomp2-release-42.0-rhel7
spi-spcomp2-release-43.*
spi-spcomp2-release-43.0
spi-spcomp2-release-44.*
spi-spcomp2-release-44.0
spi-spcomp2-release-44.1
spi-spcomp2-release-44.2
spi-spcomp2-release-45.*
spi-spcomp2-release-45.0
spi-spcomp2-release-45.1
spi-spcomp2-release-45.3
spi-spcomp2-release-45.4
spi-spcomp2-release-47.*
spi-spcomp2-release-47.0
spi-spcomp2-release-48.*
spi-spcomp2-release-48.0
spi-spcomp2-release-49.*
spi-spcomp2-release-49.1
spi-v7-Arn3.*
spi-v7-Arn3.4.73.3
spi-v8-Arn3.*
spi-v8-Arn3.4.73.6
spiArn-3.*
spiArn-3.6.74.0
spiArn-3.6.84.0
spiArn-3.6.86.0
spiArn-3.6.94.0
spiArn3.*
spiArn3.5.45.0
spiArn3.5.45.1
spiArn3.5.48.0
spiArn3.5.50.0
spiArn3.5.66.0
spiArn3.5.68.0
spiArn3.5.75.0
spiArn3.5.82.0
v2.*
v2.3.5.0-dev
v2.3.6.0-dev
v2.4.0.0-dev
v2.4.0.1-dev
v2.4.0.2-dev
v2.4.0.3-dev
v2.4.1.1-dev
v2.4.2.0-dev
v2.4.2.1-dev
v2.4.2.2-dev
v2.5.0.0-dev
v2.5.2.0-dev
v2.6.1.0-dev
v2.6.2.0-dev
v2.6.5.0-dev
v3.*
v3.0.0.0-beta1
v3.0.0.1-beta2
v3.0.0.2-RC1
v3.0.0.3
v3.0.1.0
v3.0.10.0
v3.0.10.1
v3.0.11.0
v3.0.12.0
v3.0.13.0
v3.0.14.0
v3.0.15.0
v3.0.16.0
v3.0.17.0
v3.0.18.0
v3.0.18.1
v3.0.19.0
v3.0.19.1
v3.0.2.0
v3.0.20.0
v3.0.3.0
v3.0.3.1
v3.0.4.0
v3.0.5.0
v3.0.6.0
v3.0.6.1
v3.0.7.0
v3.0.8.0
v3.0.8.1
v3.0.9.0
v3.1.10.0
v3.1.11.0
v3.1.12.0
v3.1.13.0
v3.1.13.1
v3.1.14.0
v3.1.14.1
v3.1.15.0
v3.1.4.0-beta
v3.1.5.0-beta2
v3.1.6.0-rc1
v3.1.6.1
v3.1.6.2
v3.1.7.0
v3.1.8.0
v3.1.9.0
v3.2.0.0-dev
v3.2.0.2-dev

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63638.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "181266703962185199342251563387504239002",
            "length": 7941
        },
        "id": "CVE-2026-63638-2d99c702",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/academysoftwarefoundation/openimageio/commit/6f2b2e85b3b3933ccc5a46303d5535f99bfa39fb",
        "target": {
            "file": "src/cineon.imageio/cineoninput.cpp",
            "function": "CineonInput::open"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "237866670276974577805512429709323899389",
                "190811766868406041533751923731330441034",
                "304924083861994578547816303265329631877",
                "243933318234048366087374655863033221263",
                "281364040482220300434368539699962604349"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-63638-2f11401a",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/academysoftwarefoundation/openimageio/commit/6f2b2e85b3b3933ccc5a46303d5535f99bfa39fb",
        "target": {
            "file": "src/cineon.imageio/cineoninput.cpp"
        }
    }
]
vanir_signatures_modified 
"2026-09-20T14:13:50Z"