What’s Vulnerable › Vulnerabilities

CVE-2026-45835: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-26 · updated 2026-10-15
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

Affected products

• Linux kernel: from 3.1 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30 — fixed in 5.10.258, 5.15.209, 6.1.175, 6.12.88, 6.18.30, 6.6.140

How to fix

Upgrade to a fixed version: Linux kernel 5.10.258, 5.15.209, 6.1.175, 6.12.88. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0a120d96166301d7a95be75b52f843837dbd1219
• https://git.kernel.org/stable/c/140b63cb46f2855ac4ec8fba2f1e974a9c2974e8
• https://git.kernel.org/stable/c/2422eaed0925973c0f318c94eb13e76f14c7381e
• https://git.kernel.org/stable/c/684a1f9ee2325437ae18ac5371884e4c6a25ae73
• https://git.kernel.org/stable/c/741e6024e31587b0c021b6616a9e428a4ea0b64a
• https://git.kernel.org/stable/c/76083fb80f5a38ac13326b2d810f66bd07771eea
• https://git.kernel.org/stable/c/ab77c8bc30269bee15d917059a66bea48909f5f0
• https://git.kernel.org/stable/c/bc3bb9f40da8e53896abc2d29c6d0c6686fe4ab9
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Get alerted when CVE-2026-45835 or the next vulnerability affects your stack