CVE-2025-21935 rapidio: add check for rio_add_net() in rio_scan_alloc_net()

What is CVE-2025-21935?

CVE-2025-21935 is a medium-severity vulnerability in Linux kernel, published on 1 Apr 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:

rapidio: add check for rio_add_net() in rio_scan_alloc_net()

The return value of rio_add_net() should be checked. If it fails, put_device() should be called to free the memory and give up the reference initialized in rio_add_net().

Which versions are affected by CVE-2025-21935?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-21935?

Apply the vendor's patch.

Is CVE-2025-21935 being exploited?

There is no known exploitation of CVE-2025-21935 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-2025-21935, DEBIAN-CVE-2025-21935, GHSA-f46w-cpqw-2pqr, ROOT-OS-UBUNTU-2404-CVE-2025-21935, UBUNTU-CVE-2025-21935.