SRX Series: If UTM Enhanced Content Filtering and AntiVirus are enabled, and specific traffic is processed the PFE will crash

published 2022-10-18 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-27378

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

An Unchecked Return Value to NULL Pointer Dereference vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). On SRX Series if Unified Threat Management (UTM) Enhanced Content Filtering (CF) and AntiVirus (AV) are enabled together and the system processes specific valid transit traffic the Packet Forwarding Engine (PFE) will crash and restart. This issue affects Juniper Networks Junos OS 21.4 versions prior to 21.4R1-S2, 21.4R2 on SRX Series. This issue does not affect Juniper Networks Junos OS versions prior to 21.4R1.

Patch / fix

fixed in 1

Juniper Networks Junos OS 21.4R1-S2, 21.4R2

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 17 mo ago (2025-05-12)

Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Juniper Networks Junos OS

Classification

Weakness

CWE-690 Unchecked Return Value to NULL Pointer Dereference
CWE-252 Unchecked Return Value

References

kb.juniper.net /JSA69885
vendor-advisory

Sources

CVE List CVE-2022-22231
NVD CVE-2022-22231

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Summary