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.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
The following software releases have been updated to resolve this specific issue: 22.4R3-S7, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases.
Workaround
There are no known workarounds for this issue.
Thu, 15 Jan 2026 22:15:00 +0000
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ssvc
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Thu, 15 Jan 2026 20:45:00 +0000
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| 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. | |
| Title | Junos OS: SRX and MX Series: When TCP packets occur in a specific sequence flowd crashes | |
| Weaknesses | CWE-415 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2026-01-15T21:13:00.740Z
Reserved: 2026-01-05T17:32:48.711Z
Link: CVE-2026-21918
Updated: 2026-01-15T21:12:58.010Z
Status : Received
Published: 2026-01-15T21:16:08.050
Modified: 2026-01-15T21:16:08.050
Link: CVE-2026-21918
No data.
OpenCVE Enrichment
No data.