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CVE-2021-46906 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl().


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/0e280502be1b003c3483ae03fc60dea554fcfa82 Patch 
https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8 Patch 
https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429ce Patch 
https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799f Patch 
https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1 Patch 
https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0 Patch 
https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9 Patch 
https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366 Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-668 Exposure of Resource to Wrong Sphere cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-46906
NVD Published Date:
02/26/2024
NVD Last Modified:
04/17/2024
Source:
kernel.org