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CVE-2026-55209

CVE-2026-55209 · resdata insufficiently validates untrusted GRDECL files

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 9.8 · Critical · EPSS 0.8% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • resdata

    Versions
    • < 6.2.9: Affected

    No fix published

  • resdata PyPI

    Versions
    • 3.0.1
    • 4.0.0
    • 4.1.0
    • 4.1.1
    • 4.1.2
    • 4.2.0
    • 4.2.1
    • 4.2.2
    • 4.2.3
    • 4.2.4
    • 5.0.0
    • 5.0.0b0
    • 5.0.1
    • 5.0.2
    • 5.0.3
    • 5.1.0
    • 5.1.1
    • 5.1.2
    • 5.1.3
    • 6.0.1
    • 6.1.0
    • 6.2.0
    • 6.2.2
    • 6.2.3
    • 6.2.4
    • 6.2.5
    • 6.2.6
    • 6.2.7
    • 6.2.8
    Affected ranges
    • ECOSYSTEM: < 6.2.9

    Update to 6.2.9

Original sources

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