Riskcovery

CVE-2025-52986

Junos OS and Junos OS Evolved: When RIB sharding is configured each time a show command is executed RPD memory leaks

State
Published
Severity
6.8 Medium
Published
Jul 11, 2025
Updated
Jul 15, 2025
Reserved
Jun 23, 2025

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.06.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:Mjuniper
3.15.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 21.2R3-S9Affected
  • 21.4 to before 21.4R3-S11Affected
  • 22.2 to before 22.2R3-S7Affected
  • 22.4 to before 22.4R3-S7Affected
  • 23.2 to before 23.2R2-S4Affected
  • 23.4 to before 23.4R2-S4Affected
  • 24.2 to before 24.2R2Affected
  • 24.4 to before 24.4R1-S2, 24.4R2Affected
Junos OS EvolvedJuniper Networks
  • before 22.2R3-S7-EVOAffected
  • 22.4-EVO to before 22.4R3-S7-EVOAffected
  • 23.2-EVO to before 23.2R2-S4-EVOAffected
  • 23.4-EVO to before 23.4R2-S4-EVOAffected
  • 24.2-EVO to before 24.2R2-EVOAffected
  • 24.4-EVO to before 24.4R2-EVOAffected

References

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