What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-06-17

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

Affected products

• Linux kernel: from 6.7 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.4 — fixed in 6.12.88, 6.18.30, 7.0.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.88, 6.18.30, 7.0.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1869da3efe703b016b23d4885f3fe6c1751959c6
• https://git.kernel.org/stable/c/270e5c576a6e30f6b337fa91d35b44c241297533
• https://git.kernel.org/stable/c/2fa2273016a0483217404cfe330967c4ac6832a9
• https://git.kernel.org/stable/c/3023c050af3600bf451153335dea5e073c9a3088

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