CVE-2026-33782
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Juniper Networks | Junos OS | 0 < 22.4R3-S1 | affected |
| Juniper Networks | Junos OS | 23.2 < 23.2R2 | affected |
| Juniper Networks | Junos OS | 23.4 < 23.4R2 | affected |
Weaknesses
- CWE-401: CWE-401 Missing Release of Memory after Effective Lifetime
Workarounds
There are no known workarounds for this issue.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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