CVE-2023-52439
Vulnerability from cvelistv5
Published
2024-02-20 18:34
Modified
2024-11-04 14:46
Severity ?
Summary
uio: Fix use-after-free in uio_open
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


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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.\"},{\"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. 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