CVE-2026-41227: CWE-770 Allocation of Resources Without Limits or Throttling in F5 BIG-IP
On an HTTP/2 virtual server with Layer 7 DoS Protection configured, undisclosed traffic can result in an increase in memory consumption causing the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-41227) in F5 BIG-IP arises from improper resource allocation controls on HTTP/2 virtual servers configured with Layer 7 DoS Protection. Undisclosed traffic patterns can trigger excessive memory consumption, causing the TMM process to crash and resulting in denial of service. Affected versions include 16.1.0, 17.1.0, and 17.5.0. The CVSS 3.1 score is 7.5 (high), reflecting network attack vector, no privileges or user interaction required, and impact limited to availability. No official patch or remediation guidance is currently available from the vendor. The vulnerability does not affect cloud services and no exploits are known in the wild.
Potential Impact
The vulnerability can cause denial of service by crashing the TMM process due to uncontrolled memory consumption. It does not affect confidentiality or integrity but impacts availability of the BIG-IP system. This may disrupt network traffic management and Layer 7 DoS protection functionality on affected devices.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting exposure of HTTP/2 virtual servers with Layer 7 DoS Protection or applying any recommended configuration changes from F5. Monitor official F5 communications for updates or patches addressing this issue.
CVE-2026-41227: CWE-770 Allocation of Resources Without Limits or Throttling in F5 BIG-IP
Description
On an HTTP/2 virtual server with Layer 7 DoS Protection configured, undisclosed traffic can result in an increase in memory consumption causing the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-41227) in F5 BIG-IP arises from improper resource allocation controls on HTTP/2 virtual servers configured with Layer 7 DoS Protection. Undisclosed traffic patterns can trigger excessive memory consumption, causing the TMM process to crash and resulting in denial of service. Affected versions include 16.1.0, 17.1.0, and 17.5.0. The CVSS 3.1 score is 7.5 (high), reflecting network attack vector, no privileges or user interaction required, and impact limited to availability. No official patch or remediation guidance is currently available from the vendor. The vulnerability does not affect cloud services and no exploits are known in the wild.
Potential Impact
The vulnerability can cause denial of service by crashing the TMM process due to uncontrolled memory consumption. It does not affect confidentiality or integrity but impacts availability of the BIG-IP system. This may disrupt network traffic management and Layer 7 DoS protection functionality on affected devices.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting exposure of HTTP/2 virtual servers with Layer 7 DoS Protection or applying any recommended configuration changes from F5. Monitor official F5 communications for updates or patches addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- f5
- Date Reserved
- 2026-04-30T23:04:10.867Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a049711cbff5d8610dff66b
Added to database: 5/13/2026, 3:21:53 PM
Last enriched: 5/13/2026, 3:52:01 PM
Last updated: 5/14/2026, 6:49:06 AM
Views: 5
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