CVE-2025-21599

Description

A Missing Release of Memory after Effective Lifetime vulnerability in the Juniper Tunnel Driver (jtd) of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to cause Denial of Service.  Receipt of specifically malformed IPv6 packets, destined to the device, causes kernel memory to not be freed, resulting in memory exhaustion leading to a system crash and Denial of Service (DoS). Continuous receipt and processing of these packets will continue to exhaust kernel memory, creating a sustained Denial of Service (DoS) condition. This issue only affects systems configured with IPv6. This issue affects Junos OS Evolved:  * from 22.4-EVO before 22.4R3-S5-EVO,  * from 23.2-EVO before 23.2R2-S2-EVO,  * from 23.4-EVO before 23.4R2-S2-EVO,  * from 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO. This issue does not affect Juniper Networks Junos OS Evolved versions prior to 22.4R1-EVO.

Reserved 2024-12-26 | Published 2025-01-09 | Updated 2025-01-09 | Assigner juniper

Problem types

CWE-401 Missing Release of Memory after Effective Lifetime

Product status

Default status
unaffected

22.4-EVO before 22.4R3-S5-EVO
affected

23.2-EVO before 23.2R2-S2-EVO
affected

23.4-EVO before 23.4R2-S2-EVO
affected

24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO
affected

References

supportportal.juniper.net/JSA92869 vendor-advisory

cve.org (CVE-2025-21599)

nvd.nist.gov (CVE-2025-21599)

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