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CVE-2023-52864 (GCVE-0-2023-52864)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-08-05 09:11
VLAI
Title
platform/x86: wmi: Fix opening of char device
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/x86: wmi: Fix opening of char device Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via file private data"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices(). Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver.
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/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 2024-05-22 18:21 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < cf098e937dd125c0317a0d6f261ac2a950a233d6 (git)
Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < 9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203 (git)
Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < d426a2955e45a95b2282764105fcfb110a540453 (git)
Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < e0bf076b734a2fab92d8fddc2b8b03462eee7097 (git)
Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < 44a96796d25809502c75771d40ee693c2e44724e (git)
Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < 36d85fa7ae0d6be651c1a745191fa7ef055db43e (git)
Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < fb7b06b59c6887659c6ed0ecd3110835eecbb6a3 (git)
Affected: 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 , < eba9ac7abab91c8f6d351460239108bef5e7a0b6 (git)
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Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 4.19.299 , ≤ 4.19.* (semver)
Unaffected: 5.4.261 , ≤ 5.4.* (semver)
Unaffected: 5.10.201 , ≤ 5.10.* (semver)
Unaffected: 5.15.139 , ≤ 5.15.* (semver)
Unaffected: 6.1.63 , ≤ 6.1.* (semver)
Unaffected: 6.5.12 , ≤ 6.5.* (semver)
Unaffected: 6.6.2 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52864\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:23.317\",\"lastModified\":\"2026-08-04T10:18:46.350\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nplatform/x86: wmi: Fix opening of char device\\n\\nSince commit fa1f68db6ca7 (\\\"drivers: misc: pass miscdevice pointer via\\nfile private data\\\"), the miscdevice stores a pointer to itself inside\\nfilp-\u003eprivate_data, which means that private_data will not be NULL when\\nwmi_char_open() is called. This might cause memory corruption should\\nwmi_char_open() be unable to find its driver, something which can\\nhappen when the associated WMI device is deleted in wmi_free_devices().\\n\\nFix the problem by using the miscdevice pointer to retrieve the WMI\\ndevice data associated with a char device using container_of(). This\\nalso avoids wmi_char_open() picking a wrong WMI device bound to a\\ndriver with the same name as the original driver.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: plataforma/x86: wmi: corrige la apertura del dispositivo char. Desde la confirmaci\u00f3n fa1f68db6ca7 (\\\"drivers: misc: pasar el puntero del dispositivo misc a trav\u00e9s de datos privados del archivo\\\"), el dispositivo misc almacena un puntero a s\u00ed mismo en su interior. filp-\u0026gt;private_data, lo que significa que private_data no ser\u00e1 NULL cuando se llame a wmi_char_open(). Esto podr\u00eda causar da\u00f1os en la memoria si wmi_char_open() no puede encontrar su controlador, algo que puede suceder cuando el dispositivo WMI asociado se elimina en wmi_free_devices(). Solucione el problema utilizando el puntero miscdevice para recuperar los datos del dispositivo WMI asociados con un dispositivo char usando container_of(). Esto tambi\u00e9n evita que wmi_char_open() seleccione un dispositivo WMI incorrecto vinculado a un controlador con el mismo nombre que el controlador 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:23:04+00:00",
      "cve": "CVE-2023-52864",
      "id": "CVE-2023-52864",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "927",
      "product_status:known_affected": "50",
      "product_status:known_not_affected": "25",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: platform/x86: wmi: Fix opening of char device",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52864.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-04T00:31:41Z",
      "cve": "CVE-2023-52864",
      "id": "CVE-2023-52864",
      "initial_release_date": "2024-05-23T15:23:31Z",
      "product_status:known_affected": "409",
      "product_status:known_not_affected": "76",
      "product_status:recommended": "924",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-52864",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-52864.json",
      "version": "100"
    },
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There is no network or adjacent-link path into this platform/x86 WMI code.\\nAC:H - Memory corruption requires wmi_char_open() to fail its driver lookup while misc_open still succeeds, which the fix ties to wmi_free_devices() list_del before misc_deregister\\u2014i.e. concurrent ACPI/platform WMI removal (e.g. rmmod wmi). An unprivileged attacker can spam open/ioctl but cannot induce that privileged teardown, matching other module-unload races scored AC:H.\\nPR:L - The char device is registered with mode 0444, so any local unprivileged user can open it and issue read/ioctl; no init-namespace root or capability is required on the attacker\\u2019s side of the race.\\nUI:N - The attacker opens and operates on the WMI char device in their own process; no victim action is required. Concurrent administrative device removal is Attack Complexity, not User Interaction.\\nS:U - Type confusion / use-after-free stays inside the host kernel\\u2019s WMI/misc authority and does not cross a VM, IOMMU, or sandbox boundary.\\nC:H - Failed lookup leaves filp-\u003eprivate_data as a miscdevice* that read/ioctl treat as struct wmi_block, causing out-of-bounds reads of adjacent heap; if the wblock is freed while the fd is held this becomes a UAF disclosure primitive, scored High per kernel guidance.\\nI:H - The same type confusion/UAF makes wmi_ioctl() mutex_lock, dereference handler_data, and copy_from_user() through misinterpreted pointers\\u2014yielding heap corruption and an arbitrary-write primitive after reclaim, so Integrity is High.\\nA:H - Misinterpreting a miscdevice as a wmi_block (or using a freed wblock) reliably leads to invalid memory access, oops/panic, or hang on corrupted locks; any such kernel crash/UAF is Availability High.\"}]}], \"affected\": [{\"repo\": 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via\\nfile private data\\\"), the miscdevice stores a pointer to itself inside\\nfilp-\u003eprivate_data, which means that private_data will not be NULL when\\nwmi_char_open() is called. This might cause memory corruption should\\nwmi_char_open() be unable to find its driver, something which can\\nhappen when the associated WMI device is deleted in wmi_free_devices().\\n\\nFix the problem by using the miscdevice pointer to retrieve the WMI\\ndevice data associated with a char device using container_of(). This\\nalso avoids wmi_char_open() picking a wrong WMI device bound to a\\ndriver with the same name as the original driver.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.299\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.261\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.201\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.139\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.63\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.12\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.2\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7\", \"versionStartIncluding\": \"4.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:11:43.009Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52864\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T09:11:43.009Z\", \"dateReserved\": \"2024-05-21T15:19:24.261Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:31:55.875Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





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

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.