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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities
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CVE-2021-47334 Detail

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.


Severity

 


CVSS 4.0 Severity and Metrics:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069
https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a
https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d
https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e
https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab
https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae
https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274
https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3
https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47334
NVD Published Date:
05/21/2024
NVD Last Modified:
05/21/2024
Source:
kernel.org