CVE-2024-9135Network attack vector

BGP routing interruption via peer-flap memory leak

Published Mar 4, 2025 · Updated Mar 4, 2025

Memory leak in BGP Link State in Arista EOS affected releases allows remote attackers to terminate BGP routing processing. Repeated BGP peer flaps cause the BGP agent to retain memory instead of releasing it, eventually exhausting resources and terminating routing processing. Exposure requires BGP Link State with an activated neighbor; loss of BGP processing causes route flapping without reported data disclosure or modification.

CVSS severity5.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in BGP Link State in Arista EOS affected releases allows remote attackers to terminate BGP routing processing. Repeated BGP peer flaps cause the BGP agent to retain memory instead of releasing it, eventually exhausting resources and terminating routing processing. Exposure requires BGP Link State with an activated neighbor; loss of BGP processing causes route flapping without reported data disclosure or modification.

The record

CVE
CVE-2024-9135
Published
Mar 4, 2025
Updated
Mar 4, 2025
Vendor
Arista Networks
Product
Arista EOS
Classifications
CWE-401, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 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=4.27.0 <=4.27.1
  2. Affected versionversion=4.28.0
  3. Affected versionversion=4.29.0 <=4.29.9.1
  4. Affected versionversion=4.30.0 <=4.30.8.1
  5. Affected versionversion=4.31.0 <=4.31.5
  6. Affected versionversion=4.33.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arista Networks · Arista EOSversion=4.27.0 <=4.27.1; version=4.28.0; version=4.29.0 <=4.29.9.1; version=4.30.0 <=4.30.8.1; version=4.31.0 <=4.31.5; version=4.33.0

Published CVSS scores

5.3Arista NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.002Service Exhaustion

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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