CVE-2023-52864 (GCVE-0-2023-52864)
Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-08-05 09:11
VLAI
EPSS
VEX
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
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
8 references
Impacted products
2 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) |
guessed | |
| 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) |
guessed |
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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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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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