CVE-2026-46103 can: ucan: fix devres lifetime

What is CVE-2026-46103?

CVE-2026-46103 is a medium-severity memory corruption vulnerability in Linux kernel, published on 27 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:

can: ucan: fix devres lifetime

USB drivers bind to USB interfaces and any device managed resources should have their lifetime tied to the interface rather than parent USB device. This avoids issues like memory leaks when drivers are unbound without their devices being physically disconnected (e.g. on probe deferral or configuration changes).

Fix the control message buffer lifetime so that it is released on driver unbind.

Weakness: CWE-401

Which versions are affected by CVE-2026-46103?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-46103?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-46103 being exploited?

There is no known exploitation of CVE-2026-46103 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-88472, BELL-CVE-2026-46103, DEBIAN-CVE-2026-46103, GHSA-m45c-8x83-q7fx, ROOT-OS-DEBIAN-11-CVE-2026-46103, ROOT-OS-DEBIAN-12-CVE-2026-46103 and 3 more.