Junos OS: Specific packets over VXLAN cause FPC memory leak and ultimately reset

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.

Scores

EPSS (exploitation in 30 days)

0.93% · top 39% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• Denial of Service (DoS)
• CWE-772 Missing Release of Resource after Effective Lifetime (opens in a new tab)All about CWE-772 and its CVEs

Affected products

• Juniper Networks · Junos OS

  • unaffected unspecified – < 19.4R1
  • affected 19.4 – < 19.4R2-S6, 19.4R3-S6
  • affected 20.1 – < 20.1R3-S2
  • affected 20.2 – < 20.2R3-S3
  • affected 20.3 – < 20.3R3-S1
  • affected 20.4 – < 20.4R3
  • affected 21.1 – < 21.1R3
  • affected 21.2 – < 21.2R2

What to do

Solution: The following Junos OS software releases have been updated to resolve this specific issue: 19.4R2-S6, 19.4R3-S6, 20.1R3-S2, 20.2R3-S3, 20.3R3-S1, 20.4R3, 21.1R3, 21.2R2, 21.3R1, and all subsequent releases.

Workaround: There are no viable workarounds for this issue.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

• https://kb.juniper.net/JSA11277 (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-22170](https://trackcve.app/badge/CVE-2022-22170.svg)](https://trackcve.app/cve/CVE-2022-22170)

Record last updated 17 Sept 2024, 04:23 UTC.