Bug 2499837 (CVE-2026-51537) - CVE-2026-51537 OpENer: OpENer: Out-of-bounds read via malformed ForwardOpen requests
Summary: CVE-2026-51537 OpENer: OpENer: Out-of-bounds read via malformed ForwardOpen r...
Keywords:
Status: NEW
Alias: CVE-2026-51537
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-13 22:02 UTC by OSIDB Bzimport
Modified: 2026-07-14 07:27 UTC (History)
0 users

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Description OSIDB Bzimport 2026-07-13 22:02:56 UTC 
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication.
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