CVE-2026-63998 ethtool: module: call ethnl_ops_complete() on module flash errors

What is CVE-2026-63998?

CVE-2026-63998 is a medium-severity vulnerability in Linux kernel, published on 19 Jul 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:

ethtool: module: call ethnl_ops_complete() on module flash errors

When validate() fails we are skipping over ethnl_ops_complete() even tho we already called ethnl_ops_begin().

Which versions are affected by CVE-2026-63998?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-63998?

Apply the vendor's patch.

Is CVE-2026-63998 being exploited?

There is no known exploitation of CVE-2026-63998 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-2026-63998, DEBIAN-CVE-2026-63998, GHSA-j457-3527-85c4, UBUNTU-CVE-2026-63998.