Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2022-22180 — juniper / junos

Improper Check for Unusual or Exceptional Conditions

An Improper Check for Unusual or Exceptional Conditions vulnerability in the processing of specific IPv6 packets on certain EX Series devices may lead to exhaustion of DMA memory causing a Denial of Service (DoS). Over time, exploitation of this vulnerability may cause traffic to stop being forwarded, or a crash of the fxpc process. An indication of the issue occurring may be observed through the following log messages: Sep 13 17:14:59 hostname : %PFE-3: fpc0 (buf alloc) failed allocating packet buffer Sep 13 17:14:59 hostname : %PFE-7: fpc0 brcm_pkt_buf_alloc:393 (buf alloc) failed allocating packet buffer When Packet DMA heap utilization reaches 99%, the system will become unstable. Packet DMA heap utilization can be monitored using the command: user@junos# request pfe execute target fpc0 timeout 30 command "show heap" ID Base Total(b) Free(b) Used(b) % Name -- ---------- ----------- ----------- ----------- --- ----------- 0 213301a8 536870488 387228840 149641648 27 Kernel 1 91800000 8388608 3735120 4653488 55 DMA 2 92000000 75497472 74452192 1045280 1 PKT DMA DESC 3 d330000 335544320 257091400 78452920 23 Bcm_sdk 4 96800000 184549376 2408 184546968 99 Packet DMA <<<< 5 903fffe0 20971504 20971504 0 0 Blob This issue affects: Juniper Networks Junos OS 18.4 versions prior to 18.4R2-S10, 18.4R3-S10 on EX2300 Series, EX2300-MP Series, EX3400 Series; 19.1 versions prior to 19.1R3-S7 on EX2300 Series, EX2300-MP Series, EX3400 Series; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4 on EX2300 Series, EX2300-MP Series, EX3400 Series; 19.3 versions prior to 19.3R3-S5 on EX2300 Series, EX2300-MP Series, EX3400 Series; 19.4 versions prior to 19.4R3-S7 on EX2300 Series, EX2300-MP Series, EX3400 Series; 20.1 versions prior to 20.1R3-S3 on EX2300 Series, EX2300-MP Series, EX3400 Series; 20.2 versions prior to 20.2R3-S3 on EX2300 Series, EX2300-MP Series, EX3400 Series; 20.3 versions prior to 20.3R3-S2 on EX2300 Series, EX2300-MP Series, EX3400 Series; 20.4 versions prior to 20.4R3-S1 on EX2300 Series, EX2300-MP Series, EX3400 Series; 21.1 versions prior to 21.1R2-S2, 21.1R3 on EX2300 Series, EX2300-MP Series, EX3400 Series; 21.2 versions prior to 21.2R1-S2, 21.2R2 on EX2300 Series, EX2300-MP Series, EX3400 Series; 21.3 versions prior to 21.3R1-S1, 21.3R2 on EX2300 Series, EX2300-MP Series, EX3400 Series.

  • Published: Jan 19, 2022
  • Updated: Nov 16, 2025
  • CVE: CVE-2022-22180
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:N/I:N/A:P

CWEs:

Software From Fixed in
juniper / junos 18.4-r1 18.4-r1.x
juniper / junos 18.4 18.4.x
juniper / junos 18.4-r1-s1 18.4-r1-s1.x
juniper / junos 18.4-r1-s3 18.4-r1-s3.x
juniper / junos 18.4-r1-s4 18.4-r1-s4.x
juniper / junos 18.4-r1-s2 18.4-r1-s2.x
juniper / junos 18.4-r2 18.4-r2.x
juniper / junos 18.4-r1-s5 18.4-r1-s5.x
juniper / junos 18.4-r2-s1 18.4-r2-s1.x
juniper / junos 18.4-r2-s2 18.4-r2-s2.x
juniper / junos 18.4-r3 18.4-r3.x
juniper / junos 18.4-r2-s3 18.4-r2-s3.x
juniper / junos 18.4-r1-s6 18.4-r1-s6.x
juniper / junos 18.4-r3-s2 18.4-r3-s2.x
juniper / junos 18.4-r3-s1 18.4-r3-s1.x
juniper / junos 18.4-r2-s4 18.4-r2-s4.x
juniper / junos 18.4-r3-s3 18.4-r3-s3.x
juniper / junos 18.4-r3-s4 18.4-r3-s4.x
juniper / junos 18.4-r3-s5 18.4-r3-s5.x
juniper / junos 18.4-r2-s5 18.4-r2-s5.x
juniper / junos 18.4-r2-s6 18.4-r2-s6.x
juniper / junos 18.4-r1-s7 18.4-r1-s7.x
juniper / junos 18.4-r3-s6 18.4-r3-s6.x
juniper / junos 18.4-r3-s7 18.4-r3-s7.x
juniper / junos 18.4-r2-s7 18.4-r2-s7.x
juniper / junos 18.4-r2-s8 18.4-r2-s8.x
juniper / junos 18.4-r3-s8 18.4-r3-s8.x
juniper / junos 18.4-r3-s9 18.4-r3-s9.x
juniper / junos 18.4-r2-s9 18.4-r2-s9.x
juniper / junos 19.1-r3-s7 19.1-r3-s7.x
juniper / junos 19.1-r2-s2 19.1-r2-s2.x
juniper / junos 19.1-r1-s6 19.1-r1-s6.x
juniper / junos 19.1-r1-s5 19.1-r1-s5.x
juniper / junos 19.1-r2 19.1-r2.x
juniper / junos 19.1-r1-s4 19.1-r1-s4.x
juniper / junos 19.1-r2-s1 19.1-r2-s1.x
juniper / junos 19.1-r1-s1 19.1-r1-s1.x
juniper / junos 19.1-r1-s3 19.1-r1-s3.x
juniper / junos 19.1-r1-s2 19.1-r1-s2.x
juniper / junos 19.1-r1 19.1-r1.x
juniper / junos 19.1 19.1.x
juniper / junos 19.2-r1 19.2-r1.x
juniper / junos 19.2-r1-s1 19.2-r1-s1.x
juniper / junos 19.2-r1-s2 19.2-r1-s2.x
juniper / junos 19.2-r1-s3 19.2-r1-s3.x
juniper / junos 19.2 19.2.x
juniper / junos 19.2-r1-s4 19.2-r1-s4.x
juniper / junos 19.2-r1-s5 19.2-r1-s5.x
juniper / junos 19.2-r1-s6 19.2-r1-s6.x
juniper / junos 19.2-r3-s4 19.2-r3-s4.x
juniper / junos 19.2-r1-s7 19.2-r1-s7.x
juniper / junos 19.3-r3-s4 19.3-r3-s4.x
juniper / junos 19.3-r2-s6 19.3-r2-s6.x
juniper / junos 19.3-r2-s5 19.3-r2-s5.x
juniper / junos 19.3-r2-s2 19.3-r2-s2.x
juniper / junos 19.3-r2-s4 19.3-r2-s4.x
juniper / junos 19.3-r2-s3 19.3-r2-s3.x
juniper / junos 19.3-r2 19.3-r2.x
juniper / junos 19.3-r2-s1 19.3-r2-s1.x
juniper / junos 19.3-r1-s1 19.3-r1-s1.x
juniper / junos 19.3 19.3.x
juniper / junos 19.3-r1 19.3-r1.x
juniper / junos 19.4-r1 19.4-r1.x
juniper / junos 19.4-r1-s2 19.4-r1-s2.x
juniper / junos 19.4-r2-s2 19.4-r2-s2.x
juniper / junos 19.4-r2 19.4-r2.x
juniper / junos 19.4-r2-s1 19.4-r2-s1.x
juniper / junos 19.4-r1-s1 19.4-r1-s1.x
juniper / junos 19.4-r3 19.4-r3.x
juniper / junos 19.4-r3-s1 19.4-r3-s1.x
juniper / junos 19.4-r2-s3 19.4-r2-s3.x
juniper / junos 19.4 19.4.x
juniper / junos 19.4-r3-s6 19.4-r3-s6.x
juniper / junos 19.4-r1-s3 19.4-r1-s3.x
juniper / junos 19.4-r3-s2 19.4-r3-s2.x
juniper / junos 19.4-r3-s3 19.4-r3-s3.x
juniper / junos 19.4-r3-s4 19.4-r3-s4.x
juniper / junos 19.4-r2-s4 19.4-r2-s4.x
juniper / junos 19.4-r3-s5 19.4-r3-s5.x
juniper / junos 19.4-r1-s4 19.4-r1-s4.x
juniper / junos 19.4-r2-s5 19.4-r2-s5.x
juniper / junos 20.1-r2-s2 20.1-r2-s2.x
juniper / junos 20.1-r3-s1 20.1-r3-s1.x
juniper / junos 20.1-r2 20.1-r2.x
juniper / junos 20.1-r2-s1 20.1-r2-s1.x
juniper / junos 20.1-r3 20.1-r3.x
juniper / junos 20.1-r3-s2 20.1-r3-s2.x
juniper / junos 20.1 20.1.x
juniper / junos 20.1-r1-s4 20.1-r1-s4.x
juniper / junos 20.1-r1 20.1-r1.x
juniper / junos 20.1-r1-s2 20.1-r1-s2.x
juniper / junos 20.1-r1-s3 20.1-r1-s3.x
juniper / junos 20.1-r1-s1 20.1-r1-s1.x
juniper / junos 20.2-r1 20.2-r1.x
juniper / junos 20.2-r1-s1 20.2-r1-s1.x
juniper / junos 20.2-r1-s2 20.2-r1-s2.x
juniper / junos 20.2-r1-s3 20.2-r1-s3.x
juniper / junos 20.2-r2 20.2-r2.x
juniper / junos 20.2-r2-s1 20.2-r2-s1.x
juniper / junos 20.2 20.2.x
juniper / junos 20.2-r3 20.2-r3.x
juniper / junos 20.2-r3-s1 20.2-r3-s1.x
juniper / junos 20.2-r2-s2 20.2-r2-s2.x
juniper / junos 20.2-r2-s3 20.2-r2-s3.x
juniper / junos 20.2-r3-s2 20.2-r3-s2.x
juniper / junos 20.3-r3 20.3-r3.x
juniper / junos 20.3-r2 20.3-r2.x
juniper / junos 20.3-r2-s1 20.3-r2-s1.x
juniper / junos 20.3 20.3.x
juniper / junos 20.3-r3-s1 20.3-r3-s1.x
juniper / junos 20.3-r1-s1 20.3-r1-s1.x
juniper / junos 20.3-r1 20.3-r1.x
juniper / junos 20.4-r3 20.4-r3.x
juniper / junos 20.4 20.4.x
juniper / junos 20.4-r2-s2 20.4-r2-s2.x
juniper / junos 20.4-r2 20.4-r2.x
juniper / junos 20.4-r1-s1 20.4-r1-s1.x
juniper / junos 20.4-r1 20.4-r1.x
juniper / junos 20.4-r2-s1 20.4-r2-s1.x
juniper / junos 21.1-r1-s1 21.1-r1-s1.x
juniper / junos 21.1-r2 21.1-r2.x
juniper / junos 21.1-r1 21.1-r1.x
juniper / junos 21.1-r2-s1 21.1-r2-s1.x
juniper / junos 21.1 21.1.x
juniper / junos 21.2 21.2.x
juniper / junos 21.2-r1-s1 21.2-r1-s1.x
juniper / junos 21.2-r1 21.2-r1.x
juniper / junos 21.3-r1 21.3-r1.x

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.