CVE - CVE-2021-47334

CVE-ID
CVE-2021-47334	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: misc/libmasm/module: Fix two use after free in ibmasm_init_one In ibmasm_init_one, it calls ibmasm_init_remote_input_dev(). Inside ibmasm_init_remote_input_dev, mouse_dev and keybd_dev are allocated by input_allocate_device(), and assigned to sp->remote.mouse_dev and sp->remote.keybd_dev respectively. In the err_free_devices error branch of ibmasm_init_one, mouse_dev and keybd_dev are freed by input_free_device(), and return error. Then the execution runs into error_send_message error branch of ibmasm_init_one, where ibmasm_free_remote_input_dev(sp) is called to unregister the freed sp->remote.mouse_dev and sp->remote.keybd_dev. My patch add a "error_init_remote" label to handle the error of ibmasm_init_remote_input_dev(), to avoid the uaf bugs.
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/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069 URL:https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069 MISC:https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a URL:https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a MISC:https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d URL:https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d MISC:https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e URL:https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e MISC:https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab URL:https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab MISC:https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae URL:https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae MISC:https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274 URL:https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274 MISC:https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3 URL:https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3 MISC:https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c URL:https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c
Assigning CNA
kernel.org
Date Record Created
20240521	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 (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)