Vulnerability-Lookup

GHSA-42WQ-59CJ-7GVC

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46007"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:18Z",
    "severity": null
  },
  "details": "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",
  "id": "GHSA-42wq-59cj-7gvc",
  "modified": "2026-05-27T15:33:20Z",
  "published": "2026-05-27T15:33:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46007"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1869da3efe703b016b23d4885f3fe6c1751959c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/270e5c576a6e30f6b337fa91d35b44c241297533"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fa2273016a0483217404cfe330967c4ac6832a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3023c050af3600bf451153335dea5e073c9a3088"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46007 (GCVE-0-2026-46007)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-06-14 17:47

Title

hwmon: (powerz) Avoid cacheline sharing for DMA buffer

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

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/270e5c576a6e30f6b…
https://git.kernel.org/stable/c/1869da3efe703b016…
https://git.kernel.org/stable/c/2fa2273016a048321…
https://git.kernel.org/stable/c/3023c050af3600bf4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4381a36abdf1c5c0323c1c51f869dc000115eb20 , < 270e5c576a6e30f6b337fa91d35b44c241297533 (git) Affected: 4381a36abdf1c5c0323c1c51f869dc000115eb20 , < 1869da3efe703b016b23d4885f3fe6c1751959c6 (git) Affected: 4381a36abdf1c5c0323c1c51f869dc000115eb20 , < 2fa2273016a0483217404cfe330967c4ac6832a9 (git) Affected: 4381a36abdf1c5c0323c1c51f869dc000115eb20 , < 3023c050af3600bf451153335dea5e073c9a3088 (git)
Linux	Linux	Affected: 6.7 Unaffected: 0 , < 6.7 (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/powerz.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "270e5c576a6e30f6b337fa91d35b44c241297533",
              "status": "affected",
              "version": "4381a36abdf1c5c0323c1c51f869dc000115eb20",
              "versionType": "git"
            },
            {
              "lessThan": "1869da3efe703b016b23d4885f3fe6c1751959c6",
              "status": "affected",
              "version": "4381a36abdf1c5c0323c1c51f869dc000115eb20",
              "versionType": "git"
            },
            {
              "lessThan": "2fa2273016a0483217404cfe330967c4ac6832a9",
              "status": "affected",
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            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/powerz.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
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              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.1",
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      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
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                }
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          "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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:47:37.205Z",
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      "title": "hwmon: (powerz) Avoid cacheline sharing for DMA buffer",
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    "cveId": "CVE-2026-46007",
    "datePublished": "2026-05-27T12:56:06.623Z",
    "dateReserved": "2026-05-13T15:03:33.092Z",
    "dateUpdated": "2026-06-14T17:47:37.205Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-42WQ-59CJ-7GVC

CVE-2026-46007 (GCVE-0-2026-46007)

Tags

Sightings

Nomenclature