🛡️ CVE-2026-21918
🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-415 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-415
Public Exploit ✅ No
Source NVD
Published 2026-01-15
Updated 2026-06-02
Modified 2026-01-23
Fix URL N/A

Affected Packages

Software From version Fixed in
junos

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