Junos OS (SRX firewalls)
CVE-2024-47496: MX Series: The PFE will crash on running specific command
A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS allows a local, low-privileged attacker to cause a Denial-of-Service (DoS).
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 (MX Series) 0 | 21.4R3-S9 or later |
| Junos OS (MX Series) 22.2 | 22.2R3-S5 or later |
| Junos OS (MX Series) 22.3 | 22.3R3-S4 or later |
| Junos OS (MX Series) 22.4 | 22.4R3-S2 or later |
| Junos OS (MX Series) 23.2 | 23.2R2-S1 or later |
| Junos OS (MX Series) 23.4 | 23.4R2 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS allows a local, low-privileged attacker to cause a Denial-of-Service (DoS).
When a specific command is executed, the pfe crashes. This will cause traffic forwarding to be interrupted until the system self-recovers. Repeated execution will create a sustained DoS condition.
This issue only affects MX Series devices with Line cards MPC1-MPC9. This issue affects: Junos OS on MX Series:
- All versions before 21.4R3-S9,
- from 22.2 before 22.2R3-S5,
- from 22.3 before 22.3R3-S4,
- from 22.4 before 22.4R3-S2,
- from 23.2 before 23.2R2-S1,
- from 23.4 before 23.4R2.
Workarounds
There are no known workarounds for this issue. Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.
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.