{"id":"CVE-2026-46007","state":"PUBLISHED","title":"hwmon: (powerz) Avoid cacheline sharing for DMA buffer","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (powerz) Avoid cacheline sharing for DMA buffer\n\nDepending on the architecture the transfer buffer may share a cacheline\nwith the following mutex. As the buffer may be used for DMA, that is\nproblematic.\n\nUse the high-level DMA helpers to make sure that cacheline sharing can\nnot happen.\n\nAlso drop the comment, as the helpers are documentation enough.\n\nhttps://sashiko.dev/#/message/20260408175814.934BFC19421%40smtp.kernel.org","publishedAt":"2026-05-27T12:56:06.623Z","updatedAt":"2026-06-14T17:47:37.205Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"270e5c576a6e30f6b337fa91d35b44c241297533","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"1869da3efe703b016b23d4885f3fe6c1751959c6","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"2fa2273016a0483217404cfe330967c4ac6832a9","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"3023c050af3600bf451153335dea5e073c9a3088","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]}],"references":["https://git.kernel.org/stable/c/270e5c576a6e30f6b337fa91d35b44c241297533","https://git.kernel.org/stable/c/1869da3efe703b016b23d4885f3fe6c1751959c6","https://git.kernel.org/stable/c/2fa2273016a0483217404cfe330967c4ac6832a9","https://git.kernel.org/stable/c/3023c050af3600bf451153335dea5e073c9a3088"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46007.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46007","state":"PUBLISHED","datePublished":"2026-05-27T12:56:06.623Z","dateUpdated":"2026-06-14T17:47:37.205Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.092Z"},"containers":{"cna":{"title":"hwmon: (powerz) Avoid cacheline sharing for DMA buffer","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (powerz) Avoid cacheline sharing for DMA buffer\n\nDepending on the architecture the transfer buffer may share a cacheline\nwith the following mutex. As the buffer may be used for DMA, that is\nproblematic.\n\nUse the high-level DMA helpers to make sure that cacheline sharing can\nnot happen.\n\nAlso drop the comment, as the helpers are documentation enough.\n\nhttps://sashiko.dev/#/message/20260408175814.934BFC19421%40smtp.kernel.org"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"270e5c576a6e30f6b337fa91d35b44c241297533","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"1869da3efe703b016b23d4885f3fe6c1751959c6","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"2fa2273016a0483217404cfe330967c4ac6832a9","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"3023c050af3600bf451153335dea5e073c9a3088","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/270e5c576a6e30f6b337fa91d35b44c241297533"},{"url":"https://git.kernel.org/stable/c/1869da3efe703b016b23d4885f3fe6c1751959c6"},{"url":"https://git.kernel.org/stable/c/2fa2273016a0483217404cfe330967c4ac6832a9"},{"url":"https://git.kernel.org/stable/c/3023c050af3600bf451153335dea5e073c9a3088"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:47:37.205Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}