Advisory severityMedium6.5Juniper Networks

Medium [CVE-2026-102048] Junos OS: An attacker causes l2cpd crash when FNP is used with VLAN-VPLS encapsulation enabled

This medium-severity Juniper Networks advisory covers CVE-2026-102048 affecting Junos OS.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-102048 Source published Oct 15, 2026Source updated Oct 15, 2026

VulniPulse record published Oct 15, 2026Record updated Oct 15, 2026

CVE-2026-102048

Affected products & platforms

Juniper NetworksJunos

Open source advisory

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Summary

An Allocation of Resources Without Limits or Throttling vulnerability in the l2cpd process of Juniper Networks Junos OS allows an adjacent unauthenticated attacker to cause a denial of service and l2cpd restart via FNP-enabled Layer 2 interfaces.

The issue is triggered when the FNP feature is enabled on a VPLS routing instance with VLAN-VPLS encapsulation enabled.

This issue affects all platforms except the PTX Series and SRX Series.

Affected versions

Junos OS before 23.2R2-S7.7
Junos OS 23.4 before 23.4R2-S8.13
Junos OS 24.2 before 24.2R2-S5.5
Junos OS 24.4 before 24.4R2-S5
Junos OS 25.2 before 25.2R2-S2
Junos OS 25.4 before 25.4R1-S3
Junos OS 26.2 before 26.2R1-S2

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Fixed versions

23.2R2-S7.7
23.4R2-S8.13
24.2R2-S5.5
24.4R2-S5
25.2R2-S2
25.4R1-S3
26.2R1-S2

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Mitigation

Upgrade to a fixed release: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Juniper Networks
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-102048 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-102048NVD CVE.org MITRE

Official resources

Junos OS software downloads & install/upgrade (target: 23.2R2-S7.7 / 23.4R2-S8.13 / 24.2R2-S5.5)
Official documentation
This advisory names 23.2R2-S7.7 / 23.4R2-S8.13 / 24.2R2-S5.5 as the first fixed releases — official upgrade documentation for Junos OS on SRX / MX / EX / QFX.
Junos OS release & EOL / support dates
Release notes
Confirm your train is still supported and pick a fixed maintenance release.
Juniper Security Advisories portal
Official documentation
Canonical Juniper SIRT advisory portal — search here for the full JSA text and revisions.

Discussion(0)

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