CVE-2021-23133

Published: Apr 22, 2021Modified: Jun 17, 2026

7.0

Vector

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

Exploitability: 1.0 / Impact: 5.9

Source: NVD

Description

A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.

Affected (21)

Products: Linux: Linux Kernel · Fedoraproject: Fedora · Debian: Debian Linux · +2 more

Show all products

Configuration A

5 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	From 4.10 to 4.14.232
Linux Linux Kernel	From 4.15 to 4.19.189
Linux Linux Kernel	From 4.20 to 5.4.114
Linux Linux Kernel	From 5.11 to 5.11.16
Linux Linux Kernel	From 5.5 to 5.10.32

Configuration B

3 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 32
Fedoraproject Fedora	Version 33
Fedoraproject Fedora	Version 34

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 9.0

Configuration D

2 vulnerable

Vulnerable Software	Affected Versions
Netapp Cloud Backup	All versions
Netapp Solidfire & Hci Management Node	All versions

Configuration E

1 vulnerable

Vulnerable Software	Affected Versions
Broadcom Brocade Fabric Operating System	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H410c Firmware	All versions

Running on/with	Platform Versions
Netapp H410c	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H300s Firmware	All versions

Running on/with	Platform Versions
Netapp H300s	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H500s Firmware	All versions

Running on/with	Platform Versions
Netapp H500s	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H700s Firmware	All versions

Running on/with	Platform Versions
Netapp H700s	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H300e Firmware	All versions

Running on/with	Platform Versions
Netapp H300e	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H500e Firmware	All versions

Running on/with	Platform Versions
Netapp H500e	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H700e Firmware	All versions

Running on/with	Platform Versions
Netapp H700e	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H410s Firmware	All versions

Running on/with	Platform Versions
Netapp H410s	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp Solidfire Baseboard Management Controller Firmware	All versions

Running on/with	Platform Versions
Netapp Solidfire Baseboard Management Controller	All versions

Related CWEs

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.