CVE-2026-34544

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Source
https://cve.org/CVERecord?id=CVE-2026-34544
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34544.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34544
Aliases
Downstream
Related
Published
2026-04-01T20:55:30.493Z
Modified
2026-07-15T21:12:17.155856Z
Severity
  • 8.4 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
OpenEXR: integer overflow to OOB write in uncompress_b44_impl()
Details

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, a crafted B44 or B44A EXR file can cause an out-of-bounds write in any application that decodes it via exrdecodingrun(). Consequences range from immediate crash (most likely) to corruption of adjacent heap allocations (layout-dependent). This issue has been patched in version 3.4.8.

Database specific 
{
    "cwe_ids": [
        "CWE-190",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34544.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/academysoftwarefoundation/openexr

Affected ranges

Type
GIT
Repo
https://github.com/academysoftwarefoundation/openexr
Events
Introduced
456bf42dc2fddb647c0e9ab911656e5cf757fc36
Fixed
f6f9cee0da36e8e806f7c9186f737db487782b69
Introduced
c7d3eac70ccde2c4ed484c6638b83ba872f71464
Fixed
8bb3562bd7bd833bd052224c596cb4aba94afb1b
Introduced
20a65852895894434bea88613f6d29ac8e88bd6e
Fixed
adbd2a588b47b1f6d02557571d8e36a91084da8a
Fixed
35e7aa35e22c1975606be86e859f31cc1fc598ee
Database specific 
{
    "cpe": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.2.0"
        },
        {
            "fixed": "3.2.7"
        },
        {
            "introduced": "3.3.0"
        },
        {
            "fixed": "3.3.9"
        },
        {
            "introduced": "3.4.0"
        },
        {
            "fixed": "3.4.8"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v3.*
v3.2.0
v3.2.0-rc4
v3.2.1
v3.2.1-rc
v3.2.2
v3.2.2-rc
v3.2.2-rc2
v3.2.3
v3.2.3-rc
v3.2.3-rc2
v3.2.4
v3.2.4-rc
v3.2.4-rc2
v3.2.5
v3.2.5-rc
v3.2.6
v3.2.6-rc
v3.3.0
v3.3.0-rc2
v3.3.1
v3.3.1-rc
v3.3.2
v3.3.2-rc
v3.3.2-rc2
v3.3.2-rc3
v3.3.2-rc4
v3.3.3
v3.3.3-rc
v3.3.3-rc1
v3.3.4
v3.3.4-rc
v3.3.5
v3.3.5-rc
v3.3.5-rc3
v3.3.6
v3.3.6-rc
v3.3.6-rc2
v3.3.6-rc3
v3.3.6-rc4
v3.3.7
v3.3.7-rc
v3.3.7-rc2
v3.3.7-rc3
v3.3.7-rc4
v3.3.8
v3.3.8-rc
v3.3.9-rc
v3.4.0
v3.4.1
v3.4.1-rc
v3.4.1-rc2
v3.4.2
v3.4.2-rc
v3.4.2-rc2
v3.4.3
v3.4.3-rc
v3.4.3-rc2
v3.4.3-rc3
v3.4.4
v3.4.4-rc
v3.4.4-rc2
v3.4.5
v3.4.5-rc
v3.4.6
v3.4.6-rc
v3.4.7
v3.4.7-rc

Database specific

vanir_signatures 
[
    {
        "source": "https://github.com/academysoftwarefoundation/openexr/commit/35e7aa35e22c1975606be86e859f31cc1fc598ee",
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "276397591406414987157223138669390551343",
                "207017963297339139629666808440499617952",
                "258498797786942638680668736858319268893",
                "315262617776304388131884812602531639480",
                "127504814518261423286313544445133863221",
                "39371125294579058207904839255938866702",
                "133476267992572095507630736703855750443",
                "320629989619655886061435680669864645031",
                "251896877681848548285967733398324838646",
                "151156264196910300547221049303026351707",
                "120575723358568620194983621492769081261",
                "212509365036623036242354796056745569891",
                "127504814518261423286313544445133863221",
                "39371125294579058207904839255938866702",
                "49358004077028278978047835077116679765",
                "135726513266582114988703839670503912280",
                "73668656731463308536341558883887552683"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2026-34544-416cc5a3",
        "target": {
            "file": "src/lib/OpenEXRCore/internal_b44.c"
        }
    },
    {
        "source": "https://github.com/academysoftwarefoundation/openexr/commit/35e7aa35e22c1975606be86e859f31cc1fc598ee",
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
            "function_hash": "315159114857782705814262621327102255161",
            "length": 3153.0
        },
        "deprecated": false,
        "id": "CVE-2026-34544-4e916912",
        "target": {
            "function": "compress_b44_impl",
            "file": "src/lib/OpenEXRCore/internal_b44.c"
        }
    },
    {
        "source": "https://github.com/academysoftwarefoundation/openexr/commit/35e7aa35e22c1975606be86e859f31cc1fc598ee",
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
            "function_hash": "332192218539639116713203287700456517198",
            "length": 2673.0
        },
        "deprecated": false,
        "id": "CVE-2026-34544-95d32eda",
        "target": {
            "function": "uncompress_b44_impl",
            "file": "src/lib/OpenEXRCore/internal_b44.c"
        }
    }
]
vanir_signatures_modified 
"2026-07-15T21:12:17Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34544.json"