CVE-2023-52439

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-52439
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.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2 Patch
https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea Patch
https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c Patch
https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad Patch
https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7 Patch
https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570 Patch
https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41 Patch
https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:rc8:*:*:*:*:*:*
History

15 Mar 2024, 14:21

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:4.18:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.18:rc7:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
References () https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2 - () https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2 - Patch
References () https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea - () https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea - Patch
References () https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c - () https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c - Patch
References () https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad - () https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad - Patch
References () https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7 - () https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7 - Patch
References () https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570 - () https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570 - Patch
References () https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41 - () https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41 - Patch
References () https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50 - () https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50 - Patch
CWE CWE-415
Summary
  • (es) 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(&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 se liberará idev cuando la referencia del objeto idev->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 liberará dos veces. Para solucionar este problema, podemos obtener la referencia de idev atomic & inc idev con minor_lock.

20 Feb 2024, 21:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-02-20 21:15

Updated : 2024-03-15 14:21

NVD link : CVE-2023-52439

Mitre link : CVE-2023-52439

CVE.ORG link : CVE-2023-52439

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-415

Double Free