CVE-2025-30648: Receipt of a specifically malformed DHCP packet causes jdhcpd process to crash

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	21.2R3-S9 or later
Junos OS 21.4	21.4R3-S10 or later
Junos OS 22.2	22.2R3-S6 or later
Junos OS 22.4	22.4R3-S6 or later
Junos OS 23.2	23.2R2-S3 or later
Junos OS 23.4	23.4R2-S4 or later
Junos OS 24.2	24.2R2 or later
Junos OS Evolved 22.4	22.4R3-S6-EVO or later
Junos OS Evolved 23.2	23.2R2-S3-EVO or later
Junos OS Evolved 23.4	23.4R2-S4-EVO or later
Junos OS Evolved 24.2	24.2R2-EVO or later

Always confirm against the vendor advisory, which lists every fixed hotfix.

What it is

An Improper Input Validation vulnerability in the Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause the jdhcpd process to crash resulting in a Denial of Service (DoS).

When a specifically malformed DHCP packet is received from a DHCP client, the jdhcpd process crashes, which will lead to the unavailability of the DHCP service and thereby resulting in a sustained DoS. The DHCP process will restart automatically to recover the service.

This issue will occur when dhcp-security is enabled. This issue affects Junos OS:

All versions before 21.2R3-S9,
from 21.4 before 21.4R3-S10,
from 22.2 before 22.2R3-S6,
from 22.4 before 22.4R3-S6,
from 23.2 before 23.2R2-S3,
from 23.4 before 23.4R2-S4,
from 24.2 before 24.2R2;

Junos OS Evolved: * from 22.4 before 22.4R3-S6-EVO, * from 23.2 before 23.2R2-S3-EVO, * from 23.4 before 23.4R2-S4-EVO, * from 24.2 before 24.2R2-EVO.

Am I affected?

This issue is seen when dhcp-security is enabled:

[ vlans <vlan-name> forwarding-options dhcp-security ]

Workarounds

There are no known workarounds for this issue.

Exploitation

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.