Vulnerability Details : CVE-2021-47476

In the Linux kernel, the following vulnerability has been resolved: comedi: ni_usb6501: fix NULL-deref in command paths The driver uses endpoint-sized USB transfer buffers but had no sanity checks on the sizes. This can lead to zero-size-pointer dereferences or overflowed transfer buffers in ni6501_port_command() and ni6501_counter_command() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing). Add the missing sanity checks to probe().
Published 2024-05-22 09:15:09
Updated 2025-04-02 15:10:34
Source Linux
View at NVD,   CVE.org

Products affected by CVE-2021-47476

Exploit prediction scoring system (EPSS) score for CVE-2021-47476

EPSS FAQ
0.17%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 35 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-47476

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.6
 MEDIUM CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.9
3.6
 134c704f-9b21-4f2e-91b3-4a467353bcc0 2024-11-01

CWE ids for CVE-2021-47476

  • The product dereferences a pointer that it expects to be valid but is NULL.
    Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

References for CVE-2021-47476

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