PT-2021-8188 · Linux+3 · Linux Kernel+3
Published
2021-10-20
·
Updated
2025-09-24
·
CVE-2021-47479
CVSS v3.1
7.0
High
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a use-after-free vulnerability in the
rtl8712 dl fw() function. The problem occurs due to a race condition between r871xu dev remove() and ->ndo open() callback, where the driver accesses released firmware in the ->ndo open() callback. This happens because the driver releases firmware before unregistering the netdev. The fix involves moving unregister netdev() before cleaning up resources.Technical details about exploitation include:
- Function Names:
rtl8712 dl fw(),r871xu dev remove(),ndo open() - Vulnerable Parameters or Variables: None specified
The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Os
Suse