CVE-2026-55209
criticalresdata is software for reading and writing result files from the Eclipse reservoir simulator.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/equinor/resdata/commit/9f8fd6db472e0696080b768389914d60a453904f security-advisories@github.com
- https://github.com/equinor/resdata/commit/d3f45828e9413506b8e8160a9304f4b7b06dcefc security-advisories@github.com
- https://github.com/equinor/resdata/commit/ee8cc12b026d945df3077bc98e211ee45f80a433 security-advisories@github.com
- https://github.com/equinor/resdata/pull/1166 security-advisories@github.com
- https://github.com/equinor/resdata/releases/tag/6.2.9 security-advisories@github.com
- https://github.com/equinor/resdata/security/advisories/GHSA-pr85-w493-9w3x security-advisories@github.com