CVE-2025-52986
Junos OS and Junos OS Evolved: When RIB sharding is configured each time a show command is executed RPD memory leaks
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Junos OS and Junos OS Evolved: When RIB sharding is configured each time a show command is executed RPD memory leaks
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.
- Record
CVE-2025-52986- CVSS 4.0
- 6.8 Medium
CVSS: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:M - CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-401
- Updated
- 2026-11-02
EUVDEUVD-2025-21144
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.
- Record
EUVD-2025-21144- CVSS 4.0
- 6.8 Medium
CVSS: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:M - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mfrf-wpm5-gv78
A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon...
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.
- Record
GHSA-mfrf-wpm5-gv78- CVSS 4.0
- 6.8 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X - CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-401
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-52986- CVSS 4.0
- 6.8 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X - CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-401
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-52986 is a medium vulnerability (CVSS 6.8) in Juniper Junos, published July 11, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.13%, the 2nd percentile. No source names a fixed version.