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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2023-52439

uio: Fix use-after-free in uio_open

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < 3174e0f7de1ba392dc191625da83df02d695b60caffected
  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < e93da893d52d82d57fc0db2ca566024e0f26ff50affected
  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < 5e0be1229ae199ebb90b33102f74a0f22d152570affected
  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < 5cf604ee538ed0c467abe3b4cda5308a6398f0f7affected
  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < 17a8519cb359c3b483fb5c7367efa9a8a508bdeaaffected
  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < 35f102607054faafe78d2a6994b18d5d9d6e92adaffected
  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < 913205930da6213305616ac539447702eaa85e41affected
  • 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 to < 0c9ae0b8605078eafc3bea053cc78791e97ba2e2affected
  • 13af019c87f2d90e663742cb1a819834048842aeaffected
  • 4.14.100 to < 4.15affected

Linux Linux

Default version status: affected

  • 4.18affected
  • 0 to < 4.18unaffected
  • 4.19.306 to ≤ 4.19.*unaffected
  • 5.4.268 to ≤ 5.4.*unaffected
  • 5.10.209 to ≤ 5.10.*unaffected
  • 5.15.148 to ≤ 5.15.*unaffected
  • 6.1.74 to ≤ 6.1.*unaffected
  • 6.6.13 to ≤ 6.6.*unaffected
  • 6.7.1 to ≤ 6.7.*unaffected
  • 6.8 to ≤ *unaffected

References