CVE-2026-102054: CWE-130 Improper Handling of Length Parameter Inconsistency in Juniper Networks Junos OS
Description
An Improper Handling of Length Parameter Inconsistency vulnerability in L2ALM of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to obtain stale PFE packet memory via VXLAN overlay-ping traffic sent to a local VTEP.
CVSS v3.1
Score 4.3medium
Affected software
Juniper Networks
Junos OS
Juniper Networks
Junos OS Evolved
pkg:rpm/juniper/junos-ospkg:rpm/juniper/junos-os-evoRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-102054) in Juniper Networks Junos OS and Junos OS Evolved arises from improper handling of length parameter inconsistencies in the L2ALM module. An unauthenticated attacker with adjacent network access can send VXLAN overlay-ping traffic to a local VTEP, which results in exposure of stale PFE packet memory. The flaw is identified as CWE-130. The CVSS v3.1 base score is 4.3, reflecting low impact on confidentiality and no impact on integrity or availability. The affected versions span multiple release ranges of Junos OS and Junos OS Evolved as explicitly enumerated.
Potential Impact
An unauthenticated adjacent attacker can obtain stale packet memory from the Packet Forwarding Engine (PFE) via VXLAN overlay-ping traffic. The impact is limited to partial confidentiality loss (stale memory disclosure) with no integrity or availability impact. There are no known exploits in the wild. The vulnerability does not allow remote code execution or denial of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the current data. Until a patch is available, restrict adjacent network access to the affected VXLAN overlay-ping functionality where possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T17:35:40.523Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfb66b2cdf04f6569794db
Added to database: 10/14/2026, 17:05:47 UTC
Last enriched: 10/14/2026, 18:19:17 UTC
Last updated: 10/14/2026, 21:28:30 UTC
Views: 2
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