Junos OS: MX Series: An FPC crash might be seen due to mac-moves within the same bridge domain

Description

An Improper Control of a Resource Through its Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an unauthenticated adjacent attacker to cause a Denial of Service (DoS). When there is a continuous mac move a memory corruption causes one or more FPCs to crash and reboot. These MAC moves can be between two local interfaces or between core/EVPN and local interface. The below error logs can be seen in PFE syslog when this issue happens: xss_event_handler(1071): EA[0:0]_PPE 46.xss[0] ADDR Error. ppe_error_interrupt(4298): EA[0:0]_PPE 46 Errors sync xtxn error xss_event_handler(1071): EA[0:0]_PPE 1.xss[0] ADDR Error. ppe_error_interrupt(4298): EA[0:0]_PPE 1 Errors sync xtxn error xss_event_handler(1071): EA[0:0]_PPE 2.xss[0] ADDR Error. This issue affects Juniper Networks Junos OS on MX Series: All versions prior to 15.1R7-S13; 19.1 versions prior to 19.1R3-S9; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S6; 19.4 versions prior to 19.4R2-S7, 19.4R3-S8; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S2; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R2.

Scores

EPSS (exploitation in 30 days)

0.48% · top 58% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• Denial of Service (DoS)
• CWE-664 Improper Control of a Resource Through its Lifetime (opens in a new tab)All about CWE-664 and its CVEs

Affected products

• Juniper Networks · Junos OS

  • affected unspecified – < 15.1R7-S13
  • affected 19.1 – < 19.1R3-S9
  • affected 19.2 – < 19.2R3-S6
  • affected 19.3 – < 19.3R3-S6
  • affected 19.4 – < 19.4R2-S7, 19.4R3-S8
  • affected 20.1R1 – < 20.1*
  • affected 20.2 – < 20.2R3-S5
  • affected 20.3 – < 20.3R3-S5
  • affected 20.4 – < 20.4R3-S2
  • affected 21.1 – < 21.1R3
  • affected 21.2 – < 21.2R3
  • affected 21.3 – < 21.3R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 15.1R7-S13, 19.1R3-S9, 19.2R3-S6, 19.3R3-S6, 19.4R2-S7, 19.4R3-S8, 20.2R3-S5, 20.3R3-S5, 20.4R3-S2, 21.1R3, 21.2R3, 21.3R2, 21.4R1, and all subsequent releases.

Workaround: There are no known workarounds for this issue.

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

References (1)

• https://kb.juniper.net/JSA69906 (opens in a new tab)x_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-2022-22249](https://trackcve.app/badge/CVE-2022-22249.svg)](https://trackcve.app/cve/CVE-2022-22249)

Record last updated 9 May 2025, 15:13 UTC.