CVE-2026-43134 HIGH

CVE-2026-43134: Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ

Vendor Linux
Product Linux
Published May 6, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

8.1/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ This adds a check for encryption key size upon receiving L2CAP_LE_CONN_REQ which is required by L2CAP/LE/CFC/BV-15-C which expects L2CAP_CR_LE_BAD_KEY_SIZE.

Key dates

02Disclosure timeline

May 6, 2026 CVE published
May 11, 2026 Record updated