Description

A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of packets is encountered a double free happens. This causes flowd to crash and the respective FPC to restart. This issue affects Junos OS on SRX and MX Series: * all versions before 22.4R3-S7, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R2.

INFO

Published Date :

2026-01-15T20:27:54.743Z

Last Modified :

2026-01-15T21:13:00.740Z

Source :

juniper
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21918 vulnerability.

Vendors Products
Juniper Networks
  • Junos Os
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21918.

URL Resource
https://kb.juniper.net/JSA106018 cve-icon cve-icon
https://supportportal.juniper.net/JSA106018 cve-icon cve-icon
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CVSS Vulnerability Scoring System

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Detailed values of each vector for above chart.
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Integrity Impact
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