CVE - CVE-2023-52439

CVE-ID
CVE-2023-52439	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2 URL:https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2 MISC:https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea URL:https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea MISC:https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c URL:https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c MISC:https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad URL:https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad MISC:https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7 URL:https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7 MISC:https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570 URL:https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570 MISC:https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41 URL:https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41 MISC:https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50 URL:https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50
Assigning CNA
kernel.org
Date Record Created
20240220	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240220)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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