PT-2021-3771 · Linux+9 · Linux Kernel+9
Published
2020-10-02
·
Updated
2025-03-11
·
CVE-2021-37159
CVSS v2.0
6.9
Medium
| Vector | AV:L/AC:M/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions through 5.13.4
Description
The issue is related to the
hso free net device function in the Linux kernel's drivers/net/usb/hso.c file, which calls unregister netdev without checking for the NETREG REGISTERED state. This leads to a use-after-free and a double free, potentially allowing an attacker to impact confidentiality, integrity, and availability.Recommendations
For Linux kernel versions through 5.13.4, consider updating to a version that includes a fix for this issue, as the current version may allow for exploitation due to the
hso free net device function's behavior.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.Double Free
Use After Free
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Rocky Linux
Suse
Ubuntu