CVE-2026-46007 hwmon: (powerz) Avoid cacheline sharing for DMA buffer

What is CVE-2026-46007?

CVE-2026-46007 is a medium-severity 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:

hwmon: (powerz) Avoid cacheline sharing for DMA buffer

Depending on the architecture the transfer buffer may share a cacheline with the following mutex. As the buffer may be used for DMA, that is problematic.

Use the high-level DMA helpers to make sure that cacheline sharing can not happen.

Also drop the comment, as the helpers are documentation enough.

https://sashiko.dev/#/message/20260408175814.934BFC19421%40smtp.kernel.org

Which versions are affected by CVE-2026-46007?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-46007?

Apply the vendor's patch.

Is CVE-2026-46007 being exploited?

There is no known exploitation of CVE-2026-46007 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-2026-46007, DEBIAN-CVE-2026-46007, GHSA-42wq-59cj-7gvc, ROOT-OS-UBUNTU-2404-CVE-2026-46007, UBUNTU-CVE-2026-46007.