PT-2021-8138 · Linux+4 · Linux Kernel+4
Published
2021-12-17
·
Updated
2025-01-14
·
CVE-2021-47082
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/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 vulnerability is related to a double-free issue in the
tun free netdev() function. This issue can be exploited to execute arbitrary code and elevate privileges. The problem arises from the dev->tstats and tun->security allocations being moved to a new ndo init routine (tun net init()) that is called by register netdevice(). If an error occurs during register netdevice(), the destructor (tun free netdev()) will handle the frees, potentially leading to a double-free or invalid-free condition.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Double Free
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Os
Suse
Ubuntu