CVE-2023-52473 (GCVE-0-2023-52473)

Vulnerability from cvelistv5 – Published: 2024-02-25 08:16 – Updated: 2026-05-11 19:27
VLAI
Title
thermal: core: Fix NULL pointer dereference in zone registration error path
Summary
In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix NULL pointer dereference in zone registration error path If device_register() in thermal_zone_device_register_with_trips() returns an error, the tz variable is set to NULL and subsequently dereferenced in kfree(tz->tzp). Commit adc8749b150c ("thermal/drivers/core: Use put_device() if device_register() fails") added the tz = NULL assignment in question to avoid a possible double-free after dropping the reference to the zone device. However, after commit 4649620d9404 ("thermal: core: Make thermal_zone_device_unregister() return after freeing the zone"), that assignment has become redundant, because dropping the reference to the zone device does not cause the zone object to be freed any more. Drop it to address the NULL pointer dereference.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-28 17:02 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3d439b1a2ad36c8b4ea151c8de25309d60d17407 , < 335176dd8ebaca6493807dceea33c478305667fa (git)
Affected: 3d439b1a2ad36c8b4ea151c8de25309d60d17407 , < 02871710b93058eb1249d5847c0b2d1c2c3c98ae (git)
Affected: 3d439b1a2ad36c8b4ea151c8de25309d60d17407 , < 04e6ccfc93c5a1aa1d75a537cf27e418895e20ea (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.14 , ≤ 6.6.* (semver)
Unaffected: 6.7.2 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                "value": "CWE-476"
              }
            ],
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          }
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      }
    },
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      "current_release_date": "2026-06-28T06:48:56+00:00",
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      "id": "CVE-2023-52473",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "280",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "98",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: NULL pointer dereference in zone registration error path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52473.json",
      "version": "3"
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    "suse_vex": {
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      "cve": "CVE-2023-52473",
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      "initial_release_date": "2024-02-28T03:42:03Z",
      "product_status:known_not_affected": "375",
      "product_status:recommended": "202",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-52473",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-52473.json",
      "version": "31"
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    "vulnrichment": {
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              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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                "url": "https://git.kernel.org/stable/c/04e6ccfc93c5a1aa1d75a537cf27e418895e20ea"
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            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2023-52473",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-06-28T17:02:01.299999Z",
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            ],
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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
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              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/thermal/thermal_core.c"
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
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                  "status": "affected",
                  "version": "6.4"
                },
                {
                  "lessThan": "6.4",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
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                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
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                {
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                  "status": "unaffected",
                  "version": "6.7.2",
                  "versionType": "semver"
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                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.8",
                  "versionType": "original_commit_for_fix"
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          "cpeApplicability": [
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                      "versionStartIncluding": "6.4",
                      "vulnerable": true
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                    {
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                  "negate": false,
                  "operator": "OR"
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          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Fix NULL pointer dereference in zone registration error path\n\nIf device_register() in thermal_zone_device_register_with_trips()\nreturns an error, the tz variable is set to NULL and subsequently\ndereferenced in kfree(tz-\u003etzp).\n\nCommit adc8749b150c (\"thermal/drivers/core: Use put_device() if\ndevice_register() fails\") added the tz = NULL assignment in question to\navoid a possible double-free after dropping the reference to the zone\ndevice.  However, after commit 4649620d9404 (\"thermal: core: Make\nthermal_zone_device_unregister() return after freeing the zone\"), that\nassignment has become redundant, because dropping the reference to the\nzone device does not cause the zone object to be freed any more.\n\nDrop it to address the NULL pointer dereference."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T07:37:26.795Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
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            {
              "url": "https://git.kernel.org/stable/c/02871710b93058eb1249d5847c0b2d1c2c3c98ae"
            },
            {
              "url": "https://git.kernel.org/stable/c/04e6ccfc93c5a1aa1d75a537cf27e418895e20ea"
            }
          ],
          "title": "thermal: core: Fix NULL pointer dereference in zone registration error path",
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      },
      "cveMetadata": {
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        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52473",
        "datePublished": "2024-02-25T08:16:35.551Z",
        "dateReserved": "2024-02-20T12:30:33.298Z",
        "dateUpdated": "2025-05-04T07:37:26.795Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • 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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • 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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.