CVE-2023-53170 net: dsa: Removed unneeded of_node_put in felix_parse_ports_node

What is CVE-2023-53170?

CVE-2023-53170 is a high-severity use after free vulnerability in Linux kernel, published on 15 Sep 2025. 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:

net: dsa: Removed unneeded of_node_put in felix_parse_ports_node

Remove unnecessary of_node_put from the continue path to prevent child node from being released twice, which could avoid resource leak or other unexpected issues.

Which versions are affected by CVE-2023-53170?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-53170?

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-2023-53170 being exploited?

There is no known exploitation of CVE-2023-53170 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-2023-53170, DEBIAN-CVE-2023-53170, GHSA-794c-87f2-rm5g, UBUNTU-CVE-2023-53170.