Vulnerability-Lookup

GHSA-7X76-CW6Q-RM95

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:

thermal: core: Fix thermal zone governor cleanup issues

If thermal_zone_device_register_with_trips() fails after adding a thermal governor to the thermal zone being registered, the governor is not removed from it as appropriate which may lead to a memory leak.

In turn, thermal_zone_device_unregister() calls thermal_set_governor() without acquiring the thermal zone lock beforehand which may race with a governor update via sysfs and may lead to a use-after-free in that case.

Address these issues by adding two thermal_set_governor() calls, one to thermal_release() to remove the governor from the given thermal zone, and one to the thermal zone registration error path to cover failures preceding the thermal zone device registration.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46021"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:20Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Fix thermal zone governor cleanup issues\n\nIf thermal_zone_device_register_with_trips() fails after adding\na thermal governor to the thermal zone being registered, the\ngovernor is not removed from it as appropriate which may lead to\na memory leak.\n\nIn turn, thermal_zone_device_unregister() calls thermal_set_governor()\nwithout acquiring the thermal zone lock beforehand which may race with\na governor update via sysfs and may lead to a use-after-free in that\ncase.\n\nAddress these issues by adding two thermal_set_governor() calls, one to\nthermal_release() to remove the governor from the given thermal zone,\nand one to the thermal zone registration error path to cover failures\npreceding the thermal zone device registration.",
  "id": "GHSA-7x76-cw6q-rm95",
  "modified": "2026-05-27T15:33:21Z",
  "published": "2026-05-27T15:33:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46021"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37a430a2d4e66ec8238da6c7f7e48809bf265e13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41ff66baf81c6541f4f985dd7eac4494d03d9440"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75f8f3c3e09122270986de9d7aa347d701676761"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f412e541d25a3dfaf3d53e012ade6ff03cae8a45"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46021 (GCVE-0-2026-46021)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-05-27 12:56

Title

thermal: core: Fix thermal zone governor cleanup issues

Summary

In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix thermal zone governor cleanup issues If thermal_zone_device_register_with_trips() fails after adding a thermal governor to the thermal zone being registered, the governor is not removed from it as appropriate which may lead to a memory leak. In turn, thermal_zone_device_unregister() calls thermal_set_governor() without acquiring the thermal zone lock beforehand which may race with a governor update via sysfs and may lead to a use-after-free in that case. Address these issues by adding two thermal_set_governor() calls, one to thermal_release() to remove the governor from the given thermal zone, and one to the thermal zone registration error path to cover failures preceding the thermal zone device registration.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/37a430a2d4e66ec82…
https://git.kernel.org/stable/c/f412e541d25a3dfaf…
https://git.kernel.org/stable/c/75f8f3c3e09122270…
https://git.kernel.org/stable/c/64d4ebf91d082034b…
https://git.kernel.org/stable/c/41ff66baf81c6541f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 , < 37a430a2d4e66ec8238da6c7f7e48809bf265e13 (git) Affected: e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 , < f412e541d25a3dfaf3d53e012ade6ff03cae8a45 (git) Affected: e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 , < 75f8f3c3e09122270986de9d7aa347d701676761 (git) Affected: e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 , < 64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06 (git) Affected: e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 , < 41ff66baf81c6541f4f985dd7eac4494d03d9440 (git)
Linux	Linux	Affected: 4.2 Unaffected: 0 , < 4.2 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
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          "defaultStatus": "unaffected",
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          "programFiles": [
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              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "7.0.4",
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            },
            {
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              "status": "unaffected",
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          "nodes": [
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        "dateUpdated": "2026-05-27T12:56:23.515Z",
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      "title": "thermal: core: Fix thermal zone governor cleanup issues",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46021",
    "datePublished": "2026-05-27T12:56:23.515Z",
    "dateReserved": "2026-05-13T15:03:33.092Z",
    "dateUpdated": "2026-05-27T12:56:23.515Z",
    "state": "PUBLISHED"
  },
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  "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-7X76-CW6Q-RM95

CVE-2026-46021 (GCVE-0-2026-46021)

Tags

Sightings

Nomenclature