Critical severity9.8NVD Advisory· Published Aug 18, 2026· Updated Aug 18, 2026
resdata has Classic Buffer Overflow, Improper Validation of Array Index, NULL Pointer Dereference and Out-of-bounds Read
CVE-2026-55209
Description
Impact
Prior to version 6.2.9 resdata would not correctly validate input in GRDECL files. The severity rating assumes that resdata is used to parse untrused files in a networking context such as a webservice.
Patches
The bug has been patched starting with version 6.2.9.
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Affected products
2Patches
Vulnerability mechanics
References
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