> CVE-2026-55209 [CRITICAL]

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PUBLISHED
2026-09-14 20:16
MODIFIED
2026-09-14 20:16
CVSS_SCORE V3
9.8
EPSS (Prob. Exploit)
0.78%
Top 44.5%
DATA SOURCES:
NVD đź”— 2026-09-14 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-09-21 OSV đź”— 2026-09-21

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EXPLOITABILITY
3.9
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-120 CWE-125 CWE-129 CWE-476

> CWE DETAILED DESCRIPTIONS

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') - The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. | CWE-125: Out-of-bounds Read - The product reads data past the end, or before the beginning, of the intended buffer. | CWE-129: Improper Validation of Array Index - The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. | CWE-476: NULL Pointer Dereference - The product dereferences a pointer that it expects to be valid but is NULL.

> GITHUB SECURITY ADVISORY

GHSA-pr85-w493-9w3x CRITICAL

resdata has Classic Buffer Overflow, Improper Validation of Array Index, NULL Pointer Dereference and Out-of-bounds Read

AFFECTED PACKAGES:
PIP / resdata
< 6.2.9
Fixed in: 6.2.9

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

resdata insufficiently validates untrusted GRDECL files

AFFECTED PACKAGES:
Unknown / Unknown
91 versions affected
ALIASES:
GHSA-pr85-w493-9w3x, PYSEC-2026-3694

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/09/2026 20:16
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') - The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less tha...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/equinor/resdata/commit/9f8fd6db472e0696080b768389914d60a45390...
https://github.com/equinor/resdata/commit/d3f45828e9413506b8e8160a9304f4b7b06dce...
https://github.com/equinor/resdata/commit/ee8cc12b026d945df3077bc98e211ee45f80a4...
https://github.com/equinor/resdata/pull/1166
https://github.com/equinor/resdata/releases/tag/6.2.9
https://github.com/equinor/resdata/security/advisories/GHSA-pr85-w493-9w3x
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