CVE-2026-46007

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux4381a36abdf1c5c0323c1c51f869dc000115eb20 < 270e5c576a6e30f6b337fa91d35b44c241297533affected
LinuxLinux4381a36abdf1c5c0323c1c51f869dc000115eb20 < 1869da3efe703b016b23d4885f3fe6c1751959c6affected
LinuxLinux4381a36abdf1c5c0323c1c51f869dc000115eb20 < 2fa2273016a0483217404cfe330967c4ac6832a9affected
LinuxLinux4381a36abdf1c5c0323c1c51f869dc000115eb20 < 3023c050af3600bf451153335dea5e073c9a3088affected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.30 <= 6.18.*unaffected
LinuxLinux7.0.4 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References