How severe is CVE-2022-22170?

CVE-2022-22170 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-22170 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-22170?

CVE-2022-22170 primarily affects Juniper Junos. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-22170?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-22170 published?

CVE-2022-22170 was published on 2022-01-19 and last updated on 2026-06-17.

CVE-2022-22170

CVE-2022-22170 is a high-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-772.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-772
Affected product: Juniper Junos
Published: 2022-01-19
Last modified: 2026-06-17

Description

A Missing Release of Resource after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated networked attacker to cause a Denial of Service (DoS) by sending specific packets over VXLAN which cause heap memory to leak and on exhaustion the PFE to reset. The heap memory utilization can be monitored with the command: user@host> show chassis fpc This issue affects: Juniper Networks Junos OS 19.4 versions prior to 19.4R2-S6, 19.4R3-S6; 20.1 versions prior to 20.1R3-S2; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2. This issue does not affect versions of Junos OS prior to 19.4R1.

Frequently asked questions

What is CVE-2022-22170?: A Missing Release of Resource after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated networked attacker to cause a Denial of Service (DoS) by sending specific packets over VXLAN which cause heap memory to leak and on exhaustion the PFE to reset. The heap memory utilization can be monitored with the command: user@host> show chassis fpc This issue affects: Juniper Networks Junos OS 19.4 versions prior to 19.4R2-S6, 19.4R3-S6; 20.1 versions prior to 20.1R3-S2; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2. This issue does not affect versions of Junos OS prior to 19.4R1.
How severe is CVE-2022-22170?: CVE-2022-22170 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-22170 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-22170?: CVE-2022-22170 primarily affects Juniper Junos. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-22170?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-22170 published?: CVE-2022-22170 was published on 2022-01-19 and last updated on 2026-06-17.

References

https://kb.juniper.net/JSA11277

Affected products (59)

cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r3-s2:*:*:*:*:*:*

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