CVE-2021-37159

MEDIUM

Linux Kernel < 5.13.4 - Use After Free

Title source: rule

Description

hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.

References (8)

[Issue Tracking] https://bugzilla.suse.com/show_bug.cgi?id=1188601

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20210819-0003/

[Patch, Third Party Advisory] https://www.oracle.com/security-alerts/cpujul2022.html

[Mailing List, Patch, Third Party Advisory] https://www.spinics.net/lists/linux-usb/msg202228.html

[Patch] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6ecfb39ba9d7316057cea823b196b734f6b18ca

[Patch] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dcb713d53e2eadf42b878c12a471e74dc6ed3145

Scores

CVSS v3 6.4

EPSS 0.0003

EPSS Percentile 9.3%

Attack Vector PHYSICAL

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

CWE

CWE-415 CWE-416

Status published

Affected Products (5)

linux/linux_kernel < 5.13.4

debian/debian_linux

oracle/communications_cloud_native_core_binding_support_function

oracle/communications_cloud_native_core_network_exposure_function

oracle/communications_cloud_native_core_policy

Timeline

Published Jul 21, 2021

Tracked Since Feb 18, 2026