CVE-2022-22249

FPC reboot via continuous MAC moves

Published Oct 18, 2022 · Updated May 9, 2025

Memory corruption in the PFE of Juniper Networks Junos OS on MX Series allows attackers to crash and reboot one or more FPCs. Continuous MAC moves between two local interfaces, or between a core or EVPN interface and a local interface, corrupt PFE memory. Exploitation requires adjacent access and an affected bridge domain with two local interfaces, or one local interface and EVPN MPLS, and interrupts packet forwarding while FPCs reboot.

CVSS severity6.5
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory corruption in the PFE of Juniper Networks Junos OS on MX Series allows attackers to crash and reboot one or more FPCs. Continuous MAC moves between two local interfaces, or between a core or EVPN interface and a local interface, corrupt PFE memory. Exploitation requires adjacent access and an affected bridge domain with two local interfaces, or one local interface and EVPN MPLS, and interrupts packet forwarding while FPCs reboot.

The record

CVE
CVE-2022-22249
Published
Oct 18, 2022
Updated
May 9, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-664, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 18, 2022CVE publishedPublication date reported by the CVE source.
  2. May 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=19.1 <19.1R3-S9
  2. Affected versionversion=19.2 <19.2R3-S6
  3. Affected versionversion=19.3 <19.3R3-S6
  4. Affected versionversion=19.4 <19.4R2-S7, 19.4R3-S8
  5. Affected versionversion=20.1R1 <20.1*
  6. Affected versionversion=20.2 <20.2R3-S5
  7. Affected versionversion=20.3 <20.3R3-S5
  8. Affected versionversion=20.4 <20.4R3-S2
  9. Affected versionversion=21.1 <21.1R3
  10. Affected versionversion=21.2 <21.2R3
  11. Affected versionversion=21.3 <21.3R2
  12. Affected versionversion=unspecified <15.1R7-S13

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=19.1 <19.1R3-S9; version=19.2 <19.2R3-S6; version=19.3 <19.3R3-S6; version=19.4 <19.4R2-S7, 19.4R3-S8; version=20.1R1 <20.1*; version=20.2 <20.2R3-S5; version=20.3 <20.3R3-S5; version=20.4 <20.4R3-S2; version=21.1 <21.1R3; version=21.2 <21.2R3; version=21.3 <21.3R2; version=unspecified <15.1R7-S13

Published CVSS scores

6.5Juniper NetworksCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-664Improper Control of a Resource Through its Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo