CVE-2026-55209

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Source
https://cve.org/CVERecord?id=CVE-2026-55209
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55209.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55209
Aliases
Published
2026-09-14T19:52:24Z
Modified
2026-10-28T11:14:55Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
resdata insufficiently validates untrusted GRDECL files
Details

resdata is software for reading and writing result files from the Eclipse reservoir simulator. Prior to 6.2.9, resdata insufficiently validates numeric fields, grid dimensions, keyword sizes, and array indexes while parsing untrusted GRDECL files in lib/resdata/rd_kw_grdecl.cpp and lib/resdata/rd_grid.cpp. Malformed COORD, ZCORN, CORSNUM, ACTNUM, or MAPAXES data can reach rd_grid_alloc_GRDECL_kw__ with inconsistent lengths, while unbounded floating-point conversion can exceed the intended parser buffer. In a network service that accepts untrusted GRDECL files, these conditions can cause a classic buffer overflow, out-of-bounds reads, invalid array access, NULL pointer dereference, memory corruption, or service termination. This issue is fixed in version 6.2.9.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-120",
        "CWE-125",
        "CWE-129",
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55209.json"
}
References

Affected packages

Git / github.com/equinor/resdata

Affected ranges

Type
GIT
Repo
https://github.com/equinor/resdata
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b1fb1c1c8d3814c09fa6c5e6ee75fd90a10d1916
Fixed
9f8fd6db472e0696080b768389914d60a453904f
Fixed
d3f45828e9413506b8e8160a9304f4b7b06dcefc
Fixed
ee8cc12b026d945df3077bc98e211ee45f80a433
Database specific
Show details 
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                {
                    "introduced": "0"
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                }
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            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "9f8fd6db472e0696080b768389914d60a453904f"
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            "source": "REFERENCES_COMMIT"
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            "range": [
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            "range": [
                {
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            ],
            "source": "REFERENCES_COMMIT"
        },
        {
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            "range": [
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}

Affected versions

2.*
2.10.0
2.10.1
2.11.0
2.11.0-rc0
2.11.0-rc1
2.12.0
2.13.0
2.13.1
2.13.2
2.14.0
2.14.1
2.14.2
2.14.3
2.3.a1
2.3.a10
2.3.a11
2.3.a12
2.3.a17
2.3.a2
2.3.a3
2.3.a4
2.3.a5
2.3.a6
2.3.a7
2.3.a9
2.3.b1
2.3.b2
2.3.b3
2.3.rc1
2.3.rc2
2.3.rc3
2.3.rc4
2.3a8
2.4.a1
2.4.b1
2.5.0
2.5.a0
2.5.a1
2.5.a2
2.5.b0
2.5.b1
2.5.rc0
2.5.rc1
2.5.rc2
2.6.0
2.7.0
2.7.rc0
2.8.0
2.8.0a0
2.8.0a2
2.9.0
2.9.1
2.9.2
2.9.2b0
2.9.2rc1
2.9.3
2.9.3rc0
2.9.4
2.9.5
3.*
3.0.0
3.0.1
4.*
4.0.0
4.1.0
4.1.1
4.2.0
4.2.1
4.2.2
4.2.3
4.2.4
5.*
5.0.0
5.0.0-b0
5.0.1
5.0.2
5.0.3
5.1.0
5.1.1
5.1.2
5.1.3
6.*
6.0.0
6.0.1
6.1.0
6.2.0
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
v2.*
v2.10.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55209.json"
vanir_signatures 
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vanir_signatures_modified 
"2026-10-28T11:14:55Z"