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CVE-2021-37159

Good to know:

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Date: July 20, 2021

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.

Language: C

Severity Score

Related Resources (13)

https://security-tracker.debian.org/tracker/CVE-2021-37159
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6ecfb39ba9d7316057cea823b196b734f6b18ca
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
https://security.netapp.com/advisory/ntap-20210819-0003/
https://bugzilla.suse.com/show_bug.cgi?id=1188601
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dcb713d53e2eadf42b878c12a471e74dc6ed3145
https://nvd.nist.gov/vuln/detail/CVE-2021-37159
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-37159
https://access.redhat.com/security/cve/CVE-2021-37159
https://www.oracle.com/security-alerts/cpujul2022.html
https://www.spinics.net/lists/linux-usb/msg202228.html
https://www.mend.io/vulnerability-database/CVE-2021-37159

Severity Score

Weakness Type (CWE)

Double Free

CWE-415

Use After Free

CWE-416

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): PHYSICAL
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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