CVE-2026-102053

Junos OS and Junos OS Evolved: An EVPN-VXLAN memory leak causes denial of service when active-active multihoming is used

View on CVE.org

Published Oct 14, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Description

An Improper Release of Memory Before Removing Last Reference vulnerability in the l2ald process of Juniper Networks Junos OS and Junos OS Evolved on QFX5K-family platforms allows a configured EVPN peer to cause a denial of service through memory exhaustion via EVPN-VXLAN active-active multihoming route processing.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Juniper Networks

Junos OS

unaffected

Version	Status	Constraints
`0`	affected	< 23.2R2-S7.7
`23.4`	affected	< 23.4R2-S8.13
`24.2`	affected	< 24.2R2-S5.5
`24.4`	affected	< 24.4R2-S5
`25.2`	affected	< 25.2R2-S2
`25.4`	affected	< 25.4R1-S3
`26.2`	affected	< 26.2R1-S2

Juniper Networks

Junos OS Evolved

unaffected

Version	Status	Constraints
`0`	affected	< 23.2R2-S7.7-EVO
`23.4`	affected	< 23.4R2-S8.11-EVO
`24.2`	affected	< 24.2R2-S5.6-EVO
`24.4`	affected	< 24.4R2-S5-EVO
`25.2`	affected	< 25.2R2-S2-EVO
`25.4`	affected	< 25.4R1-S3-EVO
`26.2`	affected	< 26.2R1-S2-EVO
`23.4X100`	affected	—
`25.2X100`	affected	< 25.2X100-D35-EVO
`25.4X300`	affected	< 25.4X300-D40-EVO

No data.

Vendor Product Versions

Juniper Networks

Junos Os

Version	Status	Scheme	Platform
`[0,23.2R2-S7.7)`	affected	generic	—
`[23.4,23.4R2-S8.13)`	affected	generic	—
`[24.2,24.2R2-S5.5)`	affected	generic	—
`[24.4,24.4R2-S5)`	affected	generic	—
`[25.2,25.2R2-S2)`	affected	generic	—
`[25.4,25.4R1-S3)`	affected	generic	—
`[26.2,26.2R1-S2)`	affected	generic	—

Juniper Networks

Junos Os Evolved

Version	Status	Scheme	Platform
`[0,23.2R2-S7.7-EVO)`	affected	generic	—
`[23.4,23.4R2-S8.11-EVO)`	affected	generic	—
`[24.2,24.2R2-S5.6-EVO)`	affected	generic	—
`[24.4,24.4R2-S5-EVO)`	affected	generic	—
`[25.2,25.2R2-S2-EVO)`	affected	generic	—
`[25.4,25.4R1-S3-EVO)`	affected	generic	—
`[26.2,26.2R1-S2-EVO)`	affected	generic	—
`23.4X100`	affected	generic	—
`[25.2X100,25.2X100-D35-EVO)`	affected	generic	—
`[25.4X300,25.4X300-D40-EVO)`	affected	generic	—

Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: Junos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases. Junos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases. Note: For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.

Vendor Workaround

There are no known workarounds for this issue.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.327% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://supportportal.juniper.net/JSA112187

History

Oct 17, 2026 12:45 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Juniper Networks Juniper Networks junos Os Juniper Networks junos Os Evolved
Vendors & Products		Juniper Networks Juniper Networks junos Os Juniper Networks junos Os Evolved

Oct 16, 2026 5:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 14, 2026 5:00 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		An Improper Release of Memory Before Removing Last Reference vulnerability in the l2ald process of Juniper Networks Junos OS and Junos OS Evolved on QFX5K-family platforms allows a configured EVPN peer to cause a denial of service through memory exhaustion via EVPN-VXLAN active-active multihoming route processing.
Title		Junos OS and Junos OS Evolved: An EVPN-VXLAN memory leak causes denial of service when active-active multihoming is used
Weaknesses		CWE-401
References		https://supportportal.juniper.net/JSA112187
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}` cvssV4_0 `{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/AU:Y/R:A/V:C/RE:M'}`