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.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Juniper Networks | Junos OS | unaffected |
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Vendor 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.
Vendor Workaround
There are no known workarounds for this issue.
Tracking
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No advisories yet.
| Link | Providers |
|---|---|
| https://supportportal.juniper.net/JSA112181 |
|
Wed, 14 Oct 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Junos OS: SRX Series: A high volume of DNS traffic over TCP can lead to a flowd crash | |
| Weaknesses | CWE-416 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2026-10-14T16:27:24.894Z
Reserved: 2026-09-28T17:37:38.548Z
Link: CVE-2026-102078
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-14T17:18:03.400
Modified: 2026-10-14T17:18:03.400
Link: CVE-2026-102078
Redhat
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OpenCVE Enrichment
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