CVE-2026-43332 (GCVE-0-2026-43332)
Vulnerability from cvelistv5
Published
2026-05-08 13:31
Modified
2026-08-05 12:27
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix thermal zone device registration error path If thermal_zone_device_register_with_trips() fails after registering a thermal zone device, it needs to wait for the tz->removal completion like thermal_zone_device_unregister(), in case user space has managed to take a reference to the thermal zone device's kobject, in which case thermal_release() may not be called by the error path itself and tz may be freed prematurely. Add the missing wait_for_completion() call to the thermal zone device registration error path.
References
Impacted products
Vendor Product Version
Linux Linux Version: 335176dd8ebaca6493807dceea33c478305667fa
Version: 04e6ccfc93c5a1aa1d75a537cf27e418895e20ea
Version: 04e6ccfc93c5a1aa1d75a537cf27e418895e20ea
Version: 04e6ccfc93c5a1aa1d75a537cf27e418895e20ea
Version: 04e6ccfc93c5a1aa1d75a537cf27e418895e20ea
Version: 02871710b93058eb1249d5847c0b2d1c2c3c98ae
Version: 6.6.14   ≤
Version: 6.7.2   ≤
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{
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          "defaultStatus": "unaffected",
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          "programFiles": [
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              "version": "7.0",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Fix thermal zone device registration error path\n\nIf thermal_zone_device_register_with_trips() fails after registering\na thermal zone device, it needs to wait for the tz-\u003eremoval completion\nlike thermal_zone_device_unregister(), in case user space has managed\nto take a reference to the thermal zone device\u0027s kobject, in which case\nthermal_release() may not be called by the error path itself and tz may\nbe freed prematurely.\n\nAdd the missing wait_for_completion() call to the thermal zone device\nregistration error path."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is thermal zone registration/error handling exposed through local kernel device/sysfs activity, not through remote packets or an adjacent/physical protocol.\nAC:L - The race is between local userspace taking a sysfs/kobject reference and the registration error path dropping the device reference; a local attacker can influence the reference side and resource pressure, so under the overestimate rule this is low complexity.\nPR:L - No capability is needed to take references to readable thermal sysfs objects, and a basic local user can race that exposure; root-only debugfs testing paths also exist, but the higher-severity defensible metric is low privileges.\nUI:N - Exploitation does not require a separate victim to open a file or mount anything; the attacker can run local code to monitor/open the thermal sysfs object during registration failure.\nS:U - The corrupted object is in the kernel thermal core and impacts the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossing.\nC:H - The missing wait can free the thermal zone while a kobject reference keeps release deferred, producing a use-after-free on a kernel object; such memory corruption can be leveraged for kernel memory disclosure.\nI:H - The delayed release path dereferences and frees fields from the prematurely freed thermal zone, giving exploitable heap corruption/use-after-free conditions that can support arbitrary modification or code execution.\nA:H - Even without full exploitation, the use-after-free in the device release path can cause kernel oops/panic or heap corruption, resulting in high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:27:17.446Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9e796001af97a1f7368d5114b7a8533dd98d797a"
        },
        {
          "url": "https://git.kernel.org/stable/c/604da9c04c218362e1c1457304ebeb9c199d537c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c4c7219e93319bba9ba0765dee597784c78f63c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d390f0e507dfb16d58f83a58d78d1150dc8b9d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e07e3b81807edd356e1f794cffa00a428eff443"
        }
      ],
      "title": "thermal: core: Fix thermal zone device registration error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43332",
    "datePublished": "2026-05-08T13:31:19.460Z",
    "dateReserved": "2026-05-01T14:12:56.002Z",
    "dateUpdated": "2026-08-05T12:27:17.446Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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