CVE-2021-47170

Advisory lineage Upstream: 0 Downstream: 6
Analyzed
Published: 25 Mar 2024, 09:16
Last modified:11 May 2026, 13:49

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Mar 2024, 09:16
Published
Vulnerability first disclosed
11 May 2026, 13:49
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: USB: usbfs: Don't WARN about excessively large memory allocations Syzbot found that the kernel generates a WARNing if the user tries to submit a bulk transfer through usbfs with a buffer that is way too large. This isn't a bug in the kernel; it's merely an invalid request from the user and the usbfs code does handle it correctly. In theory the same thing can happen with async transfers, or with the packet descriptor table for isochronous transfers. To prevent the MM subsystem from complaining about these bad allocation requests, add the __GFP_NOWARN flag to the kmalloc calls for these buffers.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-770•Allocation of Resources Without Limits or Throttling

    The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Affected Systems

  • linux•linux

    ≥ add1aaeabe6b08ed26381a2a06e505b2f09c3ba5, < 2ab21d6e1411999b5fb43434f421f00bf50002eb | ≥ add1aaeabe6b08ed26381a2a06e505b2f09c3ba5, < 2c835fede13e03f2743a333e4370b5ed2db91e83 | ≥ add1aaeabe6b08ed26381a2a06e505b2f09c3ba5, < 8d83f109e920d2776991fa142bb904d985dca2ed | ≥ add1aaeabe6b08ed26381a2a06e505b2f09c3ba5, < 9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098 | ≥ add1aaeabe6b08ed26381a2a06e505b2f09c3ba5, < 4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de | 3.3

  • linux•linux_kernel

    < 4.19.193 | ≥ 4.20, < 5.4.124 | ≥ 5.5, < 5.10.42 | ≥ 5.11, < 5.12.9 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3

References (5)