CVE-2026-101937: Junos OS: SRX Series: An attacker causes data-plane denial of service when chassis-cluster high availability is used

Published Oct 14, 2026

Updated

A Signed to Unsigned Conversion Error vulnerability in the srxpfe of Juniper Networks Junos OS on the SRX Series allows an adjacent attacker to cause a denial of service of the data plane via chassis-cluster fabric traffic.

Affected Software

1 affected component

Juniper Networks Junos OS

Remediation

Recommended actions to resolve this vulnerability, in priority order.

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Fixed in 23.2R2-S7.7-EVO
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Fixed in 23.4R2-S8.11-EVO
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Fixed in 24.2R2-S5.6-EVO
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Fixed in 24.4R2-S5-EVO
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Fixed in 25.2R2-S2-EVO
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Fixed in 25.2X100-D35-EVO
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Fixed in 25.4R1-S3-EVO
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Fixed in 25.4R2-EVO
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Fixed in 25.4X300-D40-EVO
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Fixed in 26.2R1-S2-EVO
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Fixed in 26.2R2-EVO
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Fixed in 26.4R1-EVO
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Fixed in 23.2R2-S7.7
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Fixed in 23.4R2-S8.13
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Fixed in 24.2R2-S5.5
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Fixed in 24.4R2-S5
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Fixed in 25.2R2-S2
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Fixed in 25.4R1-S3
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Fixed in 25.4R2
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Fixed in 26.2R1-S2
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Fixed in 26.2R2
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Fixed in 26.4R1

Event History

Oct 14, 2026

CVE Published

via MITRE·04:40 PM

Data Sourced

via MITRE·04:40 PM

RemedyDescriptionSeverityWeakness

Frequently Asked Questions

Which deployments are exposed to this issue?

The issue affects Juniper Networks Junos OS on SRX Series devices when chassis-cluster high availability is used. The affected attack path involves chassis-cluster fabric traffic.

What access does an attacker need to exploit it?

An attacker must be adjacent to the affected device or network segment. No privileges or user interaction are required according to the provided vector.

What is the operational impact of successful exploitation?

Successful exploitation can cause a denial of service affecting the data plane. The provided impact information indicates availability impact only, with no stated confidentiality or integrity impact.