CVE-2022-22153: Juniper Junos

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

An Insufficient Algorithmic Complexity combined with an Allocation of Resources Without Limits or Throttling vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series and MX Series with SPC3 allows an unauthenticated network attacker to cause latency in transit packet processing and even packet loss. If transit traffic includes a significant percentage (> 5%) of fragmented packets which need to be reassembled, high latency or packet drops might be observed. This issue affects Juniper Networks Junos OS on SRX Series, MX Series with SPC3: All versions prior to 18.2R3; 18.3 versions prior to 18.3R3; 18.4 versions prior to 18.4R2-S9, 18.4R3; 19.1 versions prior to 19.1R2; 19.2 versions prior to 19.2R1-S1, 19.2R2.

Affected products

• Juniper Junos: before 18.2 (fixed in 18.2); version 18.2 only; version 18.3 only; version 18.4 only; version 19.1 only; version 19.2 only

Published 2022-01-19. Last modified 2026-06-17.