CVE-2025-52986 Information

Jul 12, 2025 cve

Description

A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local low privileged user to cause an impact to the availability of the device.

When RIB sharding is enabled and a user executes one of several routing related ‘show’ commands a certain amount of memory is leaked. When all available memory has been consumed rpd will crash and restart.

The leak can be monitored with the CLI command:

show task memory detail | match task_shard_mgmt_cookie

where the allocated memory in bytes can be seen to continuously increase with each exploitation.

This issue affects:

Junos OS:

all versions before 21.2R3-S9
21.4 versions before 21.4R3-S11
22.2 versions before 22.2R3-S7
22.4 versions before 22.4R3-S7
23.2 versions before 23.2R2-S4 
23.4 versions before 23.4R2-S4
24.2 versions before 24.2R2
24.4 versions before 24.4R1-S2 24.4R2;

Junos OS Evolved:

all versions before 22.2R3-S7-EVO
22.4-EVO versions before 22.4R3-S7-EVO
23.2-EVO versions before 23.2R2-S4-EVO
23.4-EVO versions before 23.4R2-S4-EVO
24.2-EVO versions before 24.2R2-EVO 
24.4-EVO versions before 24.4R2-EVO.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://supportportal.juniper.net/JSA100092

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5

CNNVD-202507-1671 (Published: 2025-07-11)

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