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Back to active CVEs
High · CVSS 8.2CVE-2026-102078

Junos OS: SRX Series: A high volume of DNS traffic over TCP can lead to a flowd crashCVE-2026-102078

Answer in brief

CVE-2026-102078 records a High severity (CVSS 8.2) vulnerability in Junos OS: SRX Series: A high volume of DNS traffic over TCP can lead to a flowd crash. The current sources do not mark it as known exploited. The current feed maps Juniper Networks/Junos OS (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 Oct 14, 2026Updated Oct 14, 2026Source checked Oct 14, 2026First seen by HOL Oct 14, 2026Material review Oct 14, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.2
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.2. 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 Juniper Networks/Junos OS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Juniper Networks/Junos OSgeneric>=0 <23.2R2-S5 || >=23.4 <23.4R2-S6 || >=24.2 <24.2R2-S3 || >=24.4 <24.4R2-S1 || >=25.2 <25.2R1-S1 25.2R223.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S1, 25.2R1-S1, 25.2R2, 25.2R1-S1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Juniper Networks/Junos OS.
  2. 2Review the reported fix. Source-reported solution: The following software releases have been updated to resolve this specific issue: Junos OS: 23.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S1, 25.2R1-S1, 25.2R2, 25.4R1, and all subsequent releases.

Evidence timeline and material changes

  1. Published upstream

    Oct 14, 2026

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

  2. Source modified

    Oct 14, 2026

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

  3. First seen by HOL

    Oct 14, 2026

Sources and claim methodology

  • Source referencesupportportal.juniper.net
Upstream source description

A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When web filtering for TCP traffic is configured, a high volume of DNS requests increases the likelihood of a flowd crash and restart, which leads to a complete service outage until the service has automatically recovered. This is a race condition outside the attacker's direct control. This issue affects Junos OS on SRX Series: * All versions before 23.2R2-S5; * from 23.4 before 23.4R2-S6; * from 24.2 before 24.2R2-S3; * from 24.4 before 24.4R2-S1; * from 25.2 before 25.2R1-S1, 25.2R2.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Junos OS and Junos OS Evolved: In a scenario with VPN-flowspec and BMP monitoring a specific BGP update causes an rpd crashSame juniper networks/junos os package
  • Junos OS and Junos OS Evolved: A specific BGP ISO-VPN update causes an rpd crash when BMP or NSR is enabledSame juniper networks/junos os package
  • Junos OS and Junos OS Evolved: Unauthenticated network access causes full device takeover when J-Web is enabledSame juniper networks/junos os package
  • Dpdk: dpdk: vduse handler fails to invalidate vring pointers when iotlb is invalidated, leading to use-after-unmapAlso CWE-416
  • PAN-OS: Authenticated Remote Code Execution (RCE) in the Management InterfaceSame generic ecosystem
  • dbt: Unauthenticated Arbitrary SQL Execution in `dbt docs serve`Same generic ecosystem

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Oct 14, 2026
References
1 linked source
Open source record