CVE-2022-22240

Routing-service interruption via rpd memory exhaustion

Published Oct 18, 2022 · Updated May 9, 2025

Denial of service in Juniper Networks Junos OS and Junos OS Evolved allows local users to exhaust rpd memory via a CLI command. In high-scale BGP deployments with RIB sharding enabled, the command causes rpd to leak memory at a variable rate and temporarily spike memory use. A locally authenticated low-privilege account and the nondefault RIB-sharding configuration are required; repeated use can interrupt routing service.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Juniper Networks Junos OS and Junos OS Evolved allows local users to exhaust rpd memory via a CLI command. In high-scale BGP deployments with RIB sharding enabled, the command causes rpd to leak memory at a variable rate and temporarily spike memory use. A locally authenticated low-privilege account and the nondefault RIB-sharding configuration are required; repeated use can interrupt routing service.

The record

CVE
CVE-2022-22240
Published
Oct 18, 2022
Updated
May 9, 2025
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-770, CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 18, 2022CVE publishedPublication date reported by the CVE source.
  2. May 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=21.1R1-EVO <21.1-EVO*
  2. Affected versionversion=21.2-EVO <21.2R1-S2-EVO, 21.2R3-EVO
  3. Affected versionversion=21.3-EVO <21.3R2-EVO
  4. Affected versionversion=unspecified <20.4R3-S1-EVO

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=21.1R1-EVO <21.1-EVO*; version=21.2-EVO <21.2R1-S2-EVO, 21.2R3-EVO; version=21.3-EVO <21.3R2-EVO; version=unspecified <20.4R3-S1-EVO
Juniper Networks · Junos OSversion=19.4 <19.4R3-S9; version=20.2 <20.2R3-S5; version=20.3 <20.3R3-S2; version=20.4 <20.4R3-S1; version=21.1 <21.1R3; version=21.2 <21.2R1-S2, 21.2R2-S1, 21.2R3; version=21.3 <21.3R2

Published CVSS scores

5.5Juniper NetworksCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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