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GHSA-W9MH-RCJR-98RV

Vulnerability from github – Published: 2024-10-21 21:30 – Updated: 2024-11-08 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

thermal: core: Free tzp copy along with the thermal zone

The object pointed to by tz->tzp may still be accessed after being freed in thermal_zone_device_unregister(), so move the freeing of it to the point after the removal completion has been completed at which it cannot be accessed any more.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50027"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Free tzp copy along with the thermal zone\n\nThe object pointed to by tz-\u003etzp may still be accessed after being\nfreed in thermal_zone_device_unregister(), so move the freeing of it\nto the point after the removal completion has been completed at which\nit cannot be accessed any more.",
  "id": "GHSA-w9mh-rcjr-98rv",
  "modified": "2024-11-08T18:30:46Z",
  "published": "2024-10-21T21:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50027"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/827a07525c099f54d3b15110408824541ec66b3c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdb0d40507c85bee33c2a71fde7b2e857346f112"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eabe285e1c629a719d6e68fc319939c63b83bf22"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-50027 (GCVE-0-2024-50027)

Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2026-08-05 11:41

Title

thermal: core: Free tzp copy along with the thermal zone

Summary

In the Linux kernel, the following vulnerability has been resolved: thermal: core: Free tzp copy along with the thermal zone The object pointed to by tz->tzp may still be accessed after being freed in thermal_zone_device_unregister(), so move the freeing of it to the point after the removal completion has been completed at which it cannot be accessed any more.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-22 13:26 UTC

Assigner

Linux mitre root Scorecard

References

3 references

URL	Tags
https://git.kernel.org/stable/c/eabe285e1c629a719…
https://git.kernel.org/stable/c/bdb0d40507c85bee3…
https://git.kernel.org/stable/c/827a07525c099f54d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3d439b1a2ad36c8b4ea151c8de25309d60d17407 , < eabe285e1c629a719d6e68fc319939c63b83bf22 (git) Affected: 3d439b1a2ad36c8b4ea151c8de25309d60d17407 , < bdb0d40507c85bee33c2a71fde7b2e857346f112 (git) Affected: 3d439b1a2ad36c8b4ea151c8de25309d60d17407 , < 827a07525c099f54d3b15110408824541ec66b3c (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.60 , ≤ 6.6.* (semver) Unaffected: 6.11.4 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-50027",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-22T13:26:36.583525Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-22T13:28:46.345Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/thermal/thermal_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "eabe285e1c629a719d6e68fc319939c63b83bf22",
              "status": "affected",
              "version": "3d439b1a2ad36c8b4ea151c8de25309d60d17407",
              "versionType": "git"
            },
            {
              "lessThan": "bdb0d40507c85bee33c2a71fde7b2e857346f112",
              "status": "affected",
              "version": "3d439b1a2ad36c8b4ea151c8de25309d60d17407",
              "versionType": "git"
            },
            {
              "lessThan": "827a07525c099f54d3b15110408824541ec66b3c",
              "status": "affected",
              "version": "3d439b1a2ad36c8b4ea151c8de25309d60d17407",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/thermal/thermal_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.60",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.60",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.4",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Free tzp copy along with the thermal zone\n\nThe object pointed to by tz-\u003etzp may still be accessed after being\nfreed in thermal_zone_device_unregister(), so move the freeing of it\nto the point after the removal completion has been completed at which\nit cannot be accessed any more."
        }
      ],
      "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 dangling `tz-\u003etzp` is reached through the thermal generic-netlink family (AF_NETLINK socket, init netns) and the world-readable `/sys/class/thermal/thermal_zoneN/{slope,offset,k_*,sustainable_powe r}` attributes, and the free side is a local device/driver teardown; no remote peer parses any of this data.\nAC:L - The attacker drives the surviving side of the race itself \u2014 a tight loop of `THERMAL_GENL_CMD_TZ_GET_TEMP`/`TZ_GET_TRIP` pins the zone with `get_device()` while unregistration proceeds \u2014 and the freed window spans `device_del()` teardown, a netlink multicast delete notification and an unbounded `wait_for_completion()`, which is wide enough to reliably reclaim the 48-byte `tzp` from the heavily-trafficked kmalloc-64 cache; the attempt is repeatable at will.\nPR:L - None of the thermal genl ops set `GENL_ADMIN_PERM` (`thermal_genl_ops[]`), and `thermal_zone_get_by_id()` performs no capability check, so an ordinary unprivileged local user obtains and holds the zone reference; the `tzp` sysfs show handlers are likewise world-readable at 0444/0644.\nUI:N - The attacker\u0027s netlink polling loop needs no cooperation from any other user, and the unregistration it races is ordinary system activity (charger/battery power-supply removal, transceiver or CPU-package zone teardown, driver rebind) rather than an action the attacker must induce a victim to perform.\nS:U - The corrupted memory is kernel slab memory managed by the same kernel security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `thermal_zone_get_slope()`/`thermal_zone_get_offset()` and the power-allocator PID code read the freed `tzp`, and those values propagate into the temperature returned over netlink and sysfs, disclosing whatever kernel object has since been allocated into the reclaimed kmalloc-64 slot; as with any UAF the stale pointer generalises into an arbitrary-read primitive once the attacker controls the reallocation.\nI:H - The dangling pointer is also written through \u2014 `estimate_pid_constants()`/`get_sustainable_power()` store into `tz-\u003etzp-\u003ek_po`, `k_pu`, `k_i` and `sustainable_power`, and the `sustainable_power`/`k_*`/`slope`/`offset` sysfs store handlers assign directly through `tz-\u003etzp` \u2014 giving a heap write into a reallocated, groomable kmalloc-64 object and thus corruption of adjacent kernel structures usable for control-flow hijack and privilege escalation.\nA:H - Dereferencing the freed `tzp` (plus the `def_governor` fallback entering `power_allocator_manage()` with `tz-\u003egovernor_data` already NULLed) produces slab use-after-free corruption and oops/panic, and an unprivileged user can retry the race indefinitely."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:41:03.310Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eabe285e1c629a719d6e68fc319939c63b83bf22"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdb0d40507c85bee33c2a71fde7b2e857346f112"
        },
        {
          "url": "https://git.kernel.org/stable/c/827a07525c099f54d3b15110408824541ec66b3c"
        }
      ],
      "title": "thermal: core: Free tzp copy along with the thermal zone",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50027",
    "datePublished": "2024-10-21T19:39:31.141Z",
    "dateReserved": "2024-10-21T12:17:06.066Z",
    "dateUpdated": "2026-08-05T11:41:03.310Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-W9MH-RCJR-98RV

CVE-2024-50027 (GCVE-0-2024-50027)

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