CVE-2025-52986

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

MEDIUM

5.5

CVSS Score

Published: July 11, 2025 at 03:10 PM UTC

Updated: June 17, 2026 at 09:37 AM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

v < 21.2v < 21.2R3-S921.4 ≤ v < 21.4R3-S1122.2 ≤ v < 22.2R3-S722.4 ≤ v < 22.4R3-S723.2 ≤ v < 23.2R2-S423.4 ≤ v < 23.4R2-S424.2 ≤ v < 24.2R224.4 ≤ v < 24.4R1-S2, 24.4R221.2 21.2 r1 21.2 r1-s1 21.2 r1-s2 21.2 r2 21.2 r2-s1 21.2 r2-s2 21.2 r3 21.2 r3-s1 21.2 r3-s2 21.2 r3-s3 21.2 r3-s4 21.2 r3-s5 21.2 r3-s6 21.2 r3-s7 21.2 r3-s8 21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 21.4 r2 21.4 r2-s1 21.4 r2-s2 21.4 r3 21.4 r3-s1 21.4 r3-s10 21.4 r3-s2 21.4 r3-s3 21.4 r3-s4 21.4 r3-s5 21.4 r3-s6 21.4 r3-s7 21.4 r3-s8 21.4 r3-s9 22.2 22.2 r1 22.2 r1-s1 22.2 r1-s2 22.2 r2 22.2 r2-s1 22.2 r2-s2 22.2 r3 22.2 r3-s1 22.2 r3-s2 22.2 r3-s3 22.2 r3-s4 22.2 r3-s5 22.2 r3-s6 22.4 22.4 r1 22.4 r1-s1 22.4 r1-s2 22.4 r2 22.4 r2-s1 22.4 r2-s2 22.4 r3 22.4 r3-s1 22.4 r3-s2 22.4 r3-s3 22.4 r3-s4 22.4 r3-s5 22.4 r3-s6 23.2 23.2 r1 23.2 r1-s1 23.2 r1-s2 23.2 r2 23.2 r2-s1 23.2 r2-s2 23.2 r2-s3 23.4 23.4 r1 23.4 r1-s1 23.4 r1-s2 23.4 r2 23.4 r2-s1 23.4 r2-s2 23.4 r2-s3 24.2 24.2 r1 24.2 r1-s1 24.2 r1-s2 24.4 24.4 r1 24.4 r2

Affected range stops below 21.2R3-S9, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R3-S11, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S7, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S7, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.2R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.4R1-S2, 24.4R2, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

60%

v < 22.2R3-S7-EVO22.4-EVO ≤ v < 22.4R3-S7-EVO23.2-EVO ≤ v < 23.2R2-S4-EVO23.4-EVO ≤ v < 23.4R2-S4-EVO24.2-EVO ≤ v < 24.2R2-EVO24.4-EVO ≤ v < 24.4R2-EVO22.4-EVO 23.2-EVO 23.4-EVO 24.2-EVO 24.4-EVO

Affected range stops below 22.2R3-S7-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S7-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.2R2-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.4R2-EVO, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://supportportal.juniper.net/JSA100092

References (1)

Vendor Advisory

Source: [email protected]

https://supportportal.juniper.net/JSA100092

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMjuniper

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-401

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