CVE-2026-45834 Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()

What is CVE-2026-45834?

CVE-2026-45834 is a medium-severity vulnerability in Linux kernel, published on 26 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()

Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

Weakness: CWE-476

Which versions are affected by CVE-2026-45834?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-45834?

Apply the vendor's patch.

Is CVE-2026-45834 being exploited?

There is no known exploitation of CVE-2026-45834 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-88385, BELL-CVE-2026-45834, DEBIAN-CVE-2026-45834, GHSA-9xj3-pxmc-gv6m, ROOT-OS-DEBIAN-11-CVE-2026-45834, ROOT-OS-DEBIAN-12-CVE-2026-45834 and 3 more.