Line card crash via EVPN MAC deletion mismatch
Published Oct 18, 2022 · Updated May 9, 2025
Resource lifetime error in the Packet Forwarding Engine of Juniper Networks Junos OS and Junos OS Evolved allows attackers to reload line cards. The PFE corrupts memory when a deletion request marks as remotely learned a MAC address that it previously learned locally on an access interface. Exploitation requires EVPN-MPLS with BGP EVPN configured and adjacent access to the affected segment; the resulting FPC reload interrupts packet forwarding.
Summary
What happened
Resource lifetime error in the Packet Forwarding Engine of Juniper Networks Junos OS and Junos OS Evolved allows attackers to reload line cards. The PFE corrupts memory when a deletion request marks as remotely learned a MAC address that it previously learned locally on an access interface. Exploitation requires EVPN-MPLS with BGP EVPN configured and adjacent access to the affected segment; the resulting FPC reload interrupts packet forwarding.
The record
- CVE
- CVE-2022-22250
- Published
- Oct 18, 2022
- Updated
- May 9, 2025
- Vendor
- Juniper Networks
- Product
- Junos OS Evolved
- Classifications
- CWE-664, T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 18, 2022CVE publishedPublication date reported by the CVE source.
- May 9, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=21.1R1-EVO <21.1-EVO*
- Affected versionversion=21.2-EVO <21.2R3-EVO
- Affected versionversion=21.3-EVO <21.3R2-EVO
- Affected versionversion=21.4-EVO <21.4R1-S1-EVO, 21.4R2-EVO
- Affected versionversion=unspecified <20.4R3-S3-EVO
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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