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BIG-IP EUVD-2026-29976

| CVE-2026-40618 HIGH
Incorrect Calculation of Buffer Size (CWE-131)
2026-05-13 f5 GHSA-jrwx-v3xx-xrp8
Information Disclosure Intel
8.7
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Re-analysis Queued
May 13, 2026 - 16:22 vuln.today
cvss_changed
CVSS changed
May 13, 2026 - 16:22 NVD
7.5 (HIGH) 8.7 (HIGH)
Analysis Generated
May 13, 2026 - 15:47 vuln.today
CVE Published
May 13, 2026 - 14:12 nvd
HIGH 7.5

DescriptionNVD

When an SSL profile is configured on a virtual server on BIG-IP Virtual Edition (VE) without Intel QuickAssist Technology (QAT) or on BIG-IP hardware platforms with the database variable crypto.hwacceleration set to disabled, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

AnalysisAI

Traffic Management Microkernel (TMM) crashes in F5 BIG-IP Virtual Edition and hardware platforms when SSL profiles are configured without hardware crypto acceleration, allowing remote unauthenticated attackers to cause denial of service via undisclosed traffic patterns. CVSS 7.5 (High) with network attack vector and no prerequisites. …

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RemediationAI

Within 24 hours: Identify all F5 BIG-IP instances (Virtual Edition and hardware) and audit SSL profile configurations for hardware crypto acceleration status. Within 7 days: Apply F5 vendor patch per advisory K000158082 to all affected BIG-IP systems, prioritizing production load balancers. …

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EUVD-2026-29976 vulnerability details – vuln.today
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