CVE-2022-23015Network attack vector

Remote memory exhaustion via SSL session tickets

Published Jan 25, 2022 · Updated Aug 3, 2024

BIG-IP versions 16.x before 16.1.0, 15.1.x before 15.1.4.1, and 14.1.2.6 through 14.1.4.4 allow remote attackers to exhaust memory via SSL traffic. The condition occurs when a virtual server uses a Client SSL profile with client-certificate authentication set to request or require and Session Ticket enabled and configured; SSL processing then increases memory resource utilization. The attacker needs network access to submit SSL traffic to that configured virtual server, and the bounded consequence is service degradation or interruption from memory exhaustion.

CVSS severity7.5
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

BIG-IP versions 16.x before 16.1.0, 15.1.x before 15.1.4.1, and 14.1.2.6 through 14.1.4.4 allow remote attackers to exhaust memory via SSL traffic. The condition occurs when a virtual server uses a Client SSL profile with client-certificate authentication set to request or require and Session Ticket enabled and configured; SSL processing then increases memory resource utilization. The attacker needs network access to submit SSL traffic to that configured virtual server, and the bounded consequence is service degradation or interruption from memory exhaustion.

The record

CVE
CVE-2022-23015
Published
Jan 25, 2022
Updated
Aug 3, 2024
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=16.x before 16.1.0, 15.1.x before 15.1.4.1, and 14.1.2.6-14.1.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=16.x before 16.1.0, 15.1.x before 15.1.4.1, and 14.1.2.6-14.1.4.4

Published CVSS scores

7.1NVDAV:N/AC:M/Au:N/C:N/I:N/A:C
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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