resdata insufficiently validates untrusted GRDECL files

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55209
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 20:16:47 UTC
Updated2026-09-30 17:51:56 UTC
Descriptionresdata 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.007800000 probability, percentile 0.541610000 (date 2026-09-29)

Problem Types: CWE-120 | CWE-125 | CWE-129 | CWE-476 | CWE-120 CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | CWE-125 CWE-125: Out-of-bounds Read | CWE-129 CWE-129: Improper Validation of Array Index | CWE-476 CWE-476: NULL Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Equinor Resdata affected < 6.2.9 Not specified

References

ReferenceSourceLinkTags
github.com/equinor/resdata/commit/9f8fd6db472e0696080b768389914d60a453904f [email protected] github.com
github.com/equinor/resdata/pull/1166 [email protected] github.com
github.com/equinor/resdata/commit/ee8cc12b026d945df3077bc98e211ee45f80a433 [email protected] github.com
github.com/equinor/resdata/releases/tag/6.2.9 [email protected] github.com
github.com/equinor/resdata/security/advisories/GHSA-pr85-w493-9w3x [email protected] github.com
github.com/equinor/resdata/commit/d3f45828e9413506b8e8160a9304f4b7b06dcefc [email protected] github.com
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