A Missing Release of Memory after Effective Lifetime vulnerability in the DHCP daemon (jdhcpd) of Juniper Networks Junos OS on MX Series, allows an adjacent, unauthenticated attacker to cause a memory leak, that will eventually cause a complete Denial-of-Service (DoS).
In a DHCPv6 over PPPoE, or DHCPv6 over VLAN with Active lease query or Bulk lease query scenario, every subscriber logout will leak a small amount of memory. When all available memory has been exhausted, jdhcpd will crash and restart which causes a complete service impact until the process has recovered.
The memory usage of jdhcpd can be monitored with:
user@host> show system processes extensive | match jdhcpd
This issue affects Junos OS:
* all versions before 22.4R3-S1,
* 23.2 versions before 23.2R2,
* 23.4 versions before 23.4R2.
References
| Link | Resource |
|---|---|
| https://kb.juniper.net/JSA107820 | Vendor Advisory |
Configurations
Configuration 1 (hide)
| AND |
|
History
No history.
Information
Published : 2026-04-09 22:16
Updated : 2026-06-17 10:38
NVD link : CVE-2026-33782
Mitre link : CVE-2026-33782
CVE.ORG link : CVE-2026-33782
JSON object : View
Products Affected
juniper
- mx301
- mx240
- mx2008
- mx10004
- mx2020
- mx204
- mx2010
- mx304
- mx10008
- mx960
- mx480
- junos
CWE
CWE-401
Missing Release of Memory after Effective Lifetime