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Vulnerability · Published Jul 11, 2025 · Assigned by juniper

CVE-2025-52986Junos OS and Junos OS Evolved: When RIB sharding is configured each time a show command is executed RPD memory leaks

Medium 5.5

In plain English

A medium-severity memory leak in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 97.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Juniper Networks Junos OS 0 – before 21.2R3-S921.4 – before 21.4R3-S1122.2 – before 22.2R3-S722.4 – before 22.4R3-S723.2 – before 23.2R2-S423.4 – before 23.4R2-S424.2 – before 24.2R224.4 – before 24.4R1-S2, 24.4R2
Juniper Networks Junos OS Evolved 0 – before 22.2R3-S7-EVO22.4-EVO – before 22.4R3-S7-EVO23.2-EVO – before 23.2R2-S4-EVO23.4-EVO – before 23.4R2-S4-EVO24.2-EVO – before 24.2R2-EVO24.4-EVO – before 24.4R2-EVO

Weakness: CWE-401 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References