Junos OS (SRX firewalls)
CVE-2025-30653: LSP flap in a specific MPLS scenario leads to rpd crash
An Expired Pointer Dereference vulnerability in Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause Denial of Service (DoS).On all Junos OS and Junos OS Evolved platforms, when an MPLS Label-Switched Path (LSP) is configured with node-link-protection and transport-class, and an LSP flaps, rpd crashes and restarts.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Junos OS 0 | 22.2R3-S4 or later |
| Junos OS 22.4 | 22.4R3-S2 or later |
| Junos OS 23.2 | 23.2R2 or later |
| Junos OS 23.4 | 23.4R2 or later |
| Junos OS Evolved 0 | 22.2R3-S4-EVO or later |
| Junos OS Evolved 22.4-EVO | 22.4R3-S2-EVO or later |
| Junos OS Evolved 23.2-EVO | 23.2R2-EVO or later |
| Junos OS Evolved 23.4-EVO | 23.4R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Expired Pointer Dereference vulnerability in Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause Denial of Service (DoS).On all Junos OS and Junos OS Evolved platforms, when an MPLS Label-Switched Path (LSP) is configured with node-link-protection and transport-class, and an LSP flaps, rpd crashes and restarts. Continuous flapping of LSP can cause a sustained Denial of Service (DoS) condition.
This issue affects:
Junos OS:
- All versions before 22.2R3-S4,
- 22.4 versions before 22.4R3-S2,
- 23.2 versions before 23.2R2,
- 23.4 versions before 23.4R2.
Junos OS Evolved:
- All versions before 22.2R3-S4-EVO,
- 22.4-EVO versions before 22.4R3-S2-EVO,
- 23.2-EVO versions before 23.2R2-EVO,
- 23.4-EVO versions before 23.4R2-EVO.
Am I affected?
For this issue to occur, MPLS LSP needs to be configured with node-link-protection and transport-class. The tunnel needs to be configured with both primary (strict hops) and secondary (partially strict hops) paths.
[ protocols mpls label-switched-path tunnel-<name> node-link-protection ] [ protocols mpls label-switched-path tunnel-<name> adaptive ] [ protocols mpls label-switched-path tunnel-<name> primary <route1_name> ] [ protocols mpls label-switched-path tunnel-<name> secondary <route2_name> ] [ protocols mpls label-switched-path tunnel-<name> transport-class <name> ]
Workarounds
There are no known workarounds for this issue.
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.