hwmon: (powerz) Avoid cacheline sharing for DMA buffer

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Summary

CVECVE-2026-46007
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:18 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn 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

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.048460000 (date 2026-06-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 270e5c576a6e30f6b337fa91d35b44c241297533 git Not specified
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 1869da3efe703b016b23d4885f3fe6c1751959c6 git Not specified
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 2fa2273016a0483217404cfe330967c4ac6832a9 git Not specified
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 3023c050af3600bf451153335dea5e073c9a3088 git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.12.88 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3023c050af3600bf451153335dea5e073c9a3088 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/270e5c576a6e30f6b337fa91d35b44c241297533 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1869da3efe703b016b23d4885f3fe6c1751959c6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2fa2273016a0483217404cfe330967c4ac6832a9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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