CVE-2023-52439 (GCVE-0-2023-52439)

Vulnerability from cvelistv5 – Published: 2024-02-20 18:34 – Updated: 2025-05-04 12:49
VLAI?
Title
uio: Fix use-after-free in uio_open
Summary
In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 3174e0f7de1ba392dc191625da83df02d695b60c (git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < e93da893d52d82d57fc0db2ca566024e0f26ff50 (git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 5e0be1229ae199ebb90b33102f74a0f22d152570 (git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 5cf604ee538ed0c467abe3b4cda5308a6398f0f7 (git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 17a8519cb359c3b483fb5c7367efa9a8a508bdea (git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 35f102607054faafe78d2a6994b18d5d9d6e92ad (git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 913205930da6213305616ac539447702eaa85e41 (git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 0c9ae0b8605078eafc3bea053cc78791e97ba2e2 (git)
Affected: 13af019c87f2d90e663742cb1a819834048842ae (git)
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    Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 4.19.306 , ≤ 4.19.* (semver)
Unaffected: 5.4.268 , ≤ 5.4.* (semver)
Unaffected: 5.10.209 , ≤ 5.10.* (semver)
Unaffected: 5.15.148 , ≤ 5.15.* (semver)
Unaffected: 6.1.74 , ≤ 6.1.* (semver)
Unaffected: 6.6.13 , ≤ 6.6.* (semver)
Unaffected: 6.7.1 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52439\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-20T21:15:08.213\",\"lastModified\":\"2024-12-27T16:15:23.080\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nuio: Fix use-after-free in uio_open\\n\\ncore-1\\t\\t\\t\\tcore-2\\n-------------------------------------------------------\\nuio_unregister_device\\t\\tuio_open\\n\\t\\t\\t\\tidev = idr_find()\\ndevice_unregister(\u0026idev-\u003edev)\\nput_device(\u0026idev-\u003edev)\\nuio_device_release\\n\\t\\t\\t\\tget_device(\u0026idev-\u003edev)\\nkfree(idev)\\nuio_free_minor(minor)\\n\\t\\t\\t\\tuio_release\\n\\t\\t\\t\\tput_device(\u0026idev-\u003edev)\\n\\t\\t\\t\\tkfree(idev)\\n-------------------------------------------------------\\n\\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\\nidev when the idev-\u003edev kobject ref is 1. But after core-1\\ndevice_unregister, put_device and before doing kfree, the core-2 may\\nget_device. Then:\\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\\n2. When core-2 do uio_release and put_device, the idev will be double\\n   freed.\\n\\nTo address this issue, we can get idev atomic \u0026 inc idev reference with\\nminor_lock.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: uio: corrige use-after-free en uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(\u0026amp;idev-\u0026gt;dev) put_device(\u0026amp;idev-\u0026gt;dev) uio_device_release get_device(\u0026amp;idev-\u0026gt;dev) kfree(idev) uio_free_minor(minor) uio_release put_device(\u0026amp;idev-\u0026gt;dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister se liberar\u00e1 idev cuando la referencia del objeto idev-\u0026gt;dev kobject es 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, el idev se liberar\u00e1 dos veces. Para solucionar este problema, podemos obtener la referencia de idev atomic \u0026amp; inc idev con 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But after core-1\\ndevice_unregister, put_device and before doing kfree, the core-2 may\\nget_device. Then:\\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\\n2. When core-2 do uio_release and put_device, the idev will be double\\n   freed.\\n\\nTo address this issue, we can get idev atomic \u0026 inc idev reference with\\nminor_lock.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.306\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.268\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.209\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.148\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.74\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.13\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.1\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.100\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:49:00.841Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52439\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:49:00.841Z\", \"dateReserved\": \"2024-02-20T12:30:33.291Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-20T18:34:49.323Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.