CVE-2026-23464 soc: microchip: mpfs: Fix memory leak in mpfs_sys_controller_probe()

What is CVE-2026-23464?

CVE-2026-23464 is a medium-severity denial of service vulnerability in Linux kernel, published on 3 Apr 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:

soc: microchip: mpfs: Fix memory leak in mpfs_sys_controller_probe()

In mpfs_sys_controller_probe(), if of_get_mtd_device_by_node() fails, the function returns immediately without freeing the allocated memory for sys_controller, leading to a memory leak.

Fix this by jumping to the out_free label to ensure the memory is properly freed.

Also, consolidate the error handling for the mbox_request_channel() failure case to use the same label.

Weakness: CWE-401

Which versions are affected by CVE-2026-23464?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-23464?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-23464 being exploited?

There is no known exploitation of CVE-2026-23464 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 BELL-CVE-2026-23464, DEBIAN-CVE-2026-23464, GHSA-45hw-xggf-p88g, ROOT-OS-DEBIAN-13-CVE-2026-23464, ROOT-OS-UBUNTU-2404-CVE-2026-23464, UBUNTU-CVE-2026-23464.