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Advisory severityMedium5.9Juniper Networks Updated

Medium [CVE-2026-102086] NULL Pointer Dereference vulnerability in the DNS plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS)

This medium-severity Juniper Networks advisory covers CVE-2026-102086 affecting Junos OS.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-102086 Source published Source updated

VulniPulse record published Record updated

CVE-2026-102086
Affected products & platforms
Juniper NetworksJunos
Open source advisory

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Summary

A NULL Pointer Dereference vulnerability in the DNS plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS).

When multiple DNS queries are received in a single flow session, where one query matches a Security Intelligence (SecIntel) feed and another query is sent for DNS Domain Generation Algorithm (DGA) analysis, an error in processing logging of these asynchronous tasks can lead to an FPC crash.

The exact timing conditions are outside an attacker's direct control.

This issue affects Junos OS on SRX Series:

  • All versions before 23.2R2-S7.7;
  • from 23.4 before 23.4R2-S8.13;
  • from 25.4 before 25.4R1-S2.
Affected versions
  • * All versions before 23

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Fixed versions
  • 23.2R2-S7.7
  • 23.4R2-S8.13
  • 24.2R2-S5.5
  • 24.4R2-S4
  • 25.2R2-S1
  • 25.4R1-S2

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Mitigation

Upgrade to a fixed release: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S4, 25.2R2-S1, 25.4R1-S2. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Discussion(0)

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