CVE-2022-3565 Linux Kernel Bluetooth l1oip_core.c del_timer use after free

What is CVE-2022-3565?

CVE-2022-3565 is a medium-severity use after free vulnerability in Linux kernel, published on 17 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability, which was classified as critical, has been found in Linux Kernel. Affected by this issue is the function del_timer of the file drivers/isdn/mISDN/l1oip_core.c of the component Bluetooth. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211088.

Weakness: CWE-662, CWE-119

Which versions are affected by CVE-2022-3565?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-3565?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2022-3565 being exploited?

There is no known exploitation of CVE-2022-3565 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 DEBIAN-CVE-2022-3565, GHSA-w8wm-5qpx-c8j6, UBUNTU-CVE-2022-3565.