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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2022-49755 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait While performing fast composition switch, there is a possibility that the process of ffs_ep0_write/ffs_ep0_read get into a race condition due to ep0req being freed up from functionfs_unbind. Consider the scenario that the ffs_ep0_write calls the ffs_ep0_queue_wait by taking a lock &ffs->ev.waitq.lock. However, the functionfs_unbind isn't bounded so it can go ahead and mark the ep0req to NULL, and since there is no NULL check in ffs_ep0_queue_wait we will end up in use-after-free. Fix this by making a serialized execution between the two functions using a mutex_lock(ffs->mutex).


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

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

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/6a19da111057f69214b97c62fb0ac59023970850 Patch 
https://git.kernel.org/stable/c/6aee197b7fbcd61596a78b47d553f2f99111f217 Patch 
https://git.kernel.org/stable/c/6dd9ea05534f323668db94fcc2726c7a84547e78 Patch 
https://git.kernel.org/stable/c/a8d40942df074f4ebcb9bd3413596d92f323b064 Patch 
https://git.kernel.org/stable/c/ae8e136bcaae96163b5821984de1036efc9abb1a Patch 
https://git.kernel.org/stable/c/e9036e951f93fb8d7b5e9d6e2c7f94a4da312ae4 Patch 
https://git.kernel.org/stable/c/facf353c9e8d7885b686d9a4b173d4e0af6441d2 Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-49755
NVD Published Date:
03/27/2025
NVD Last Modified:
04/01/2025
Source:
kernel.org