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Linux Kernel EUVD-2026-26617

| CVE-2026-43018 HIGH
Use After Free (CWE-416)
2026-05-01 Linux
8.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

7
Analysis Generated
May 03, 2026 - 07:34 vuln.today
CVSS changed
May 03, 2026 - 07:22 NVD
8.8 (HIGH)
Patch released
May 03, 2026 - 07:16 nvd
Patch available
Patch available
May 01, 2026 - 16:33 EUVD
EUVD ID Assigned
May 01, 2026 - 15:00 euvd
EUVD-2026-26617
Analysis Generated
May 01, 2026 - 15:00 vuln.today
CVE Published
May 01, 2026 - 14:15 nvd
HIGH 8.8

DescriptionNVD

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt

hci_conn lookup and field access must be covered by hdev lock in hci_le_remote_conn_param_req_evt, otherwise it's possible it is freed concurrently.

Extend the hci_dev_lock critical section to cover all conn usage.

AnalysisAI

Use-after-free in Linux Kernel Bluetooth stack allows adjacent network attackers to execute arbitrary code, escalate privileges, or cause denial of service without authentication. The vulnerability exists in hci_le_remote_conn_param_req_evt where hci_conn lookup and field access occurs outside the hdev lock protection, enabling concurrent memory corruption. …

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RemediationAI

Within 24 hours: Identify all systems running Linux kernel versions prior to 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, or 7.0 mainline; document Bluetooth exposure (enabled/in-use). Within 7 days: Apply kernel patches to all affected systems (prioritize production servers and edge devices with Bluetooth enabled); test updates in non-production environments first. …

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Vendor StatusVendor

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EUVD-2026-26617 vulnerability details – vuln.today

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