CVE-2026-22548Network attack vector

Unauthenticated service interruption via bd process race

Published Feb 4, 2026 · Updated Feb 4, 2026

Race condition in F5 BIG-IP 17.1.0 through 17.1.2 allows remote attackers to terminate the bd process through crafted requests. F5 has not disclosed the request form or the shared resource that BIG-IP ASM or Advanced WAF handles without proper synchronization. Reachability requires a security policy on a virtual server and additional race conditions beyond attacker control; successful exploitation interrupts application-security processing.

CVSS severity8.2
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in F5 BIG-IP 17.1.0 through 17.1.2 allows remote attackers to terminate the bd process through crafted requests. F5 has not disclosed the request form or the shared resource that BIG-IP ASM or Advanced WAF handles without proper synchronization. Reachability requires a security policy on a virtual server and additional race conditions beyond attacker control; successful exploitation interrupts application-security processing.

The record

CVE
CVE-2026-22548
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-362, T1489
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2026Record 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=17.1.0 <17.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=17.1.0 <17.1.3

Published CVSS scores

5.9F5 NetworksCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
8.2F5 NetworksCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1489Service Stop

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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