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Back to active CVEs
Medium · CVSS 6.0CVE-2026-90782

S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()CVE-2026-90782

Answer in brief

CVE-2026-90782 records a Medium severity (CVSS 6.0) vulnerability in S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items(). The current sources do not mark it as known exploited. The current feed maps Systerel/S2OPC (generic), Systerel/S2OPC (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 13, 2026Updated Sep 23, 2026Source checked Oct 28, 2026First seen by HOL Sep 13, 2026Material review Sep 23, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-476
Source
CVE List V5
Source checked
Oct 28, 2026
References
6 linked sources
Open source record

Key facts

Risk
Medium · CVSS 6.0
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Systerel/S2OPC (generic), Systerel/S2OPC (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Systerel/S2OPCgeneric0Not reported
Systerel/S2OPCgeneric>=0 <=1.7.3Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Systerel/S2OPC, Systerel/S2OPC.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 13, 2026

Sources and claim methodology

  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencevulncheck.com
Upstream source description

S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.

Quoted source text, attributed separately from HOL analysis.