What is CVE-2021-23133?

CVE-2021-23133 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2021-23133 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-23133?

CVE-2021-23133 has a CVSS score of 7.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-23133?

No patch is currently available for CVE-2021-23133. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-23133 actively exploited?

CVE-2021-23133 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2021-23133

High

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.

Package Linux Kernel

Published 2021-04-22

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.0

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-362

CVE-2021-23133 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-23133 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

Mitigation Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

Mitigation Third Party Advisory
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/
Security
https://security.netapp.com/advisory/ntap-20210611-0008/

Third Party Advisory
Kernel patch commit
http://www.openwall.com/lists/oss-security/2021/05/10/1
Patch
Kernel patch commit
http://www.openwall.com/lists/oss-security/2021/05/10/2
Patch
Kernel patch commit
http://www.openwall.com/lists/oss-security/2021/05/10/3
Patch

6 patch commits total View all on NVD

Details

CVE ID CVE-2021-23133

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2021-04-22

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-23133?

CVE-2021-23133 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2021-23133 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-23133?

CVE-2021-23133 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-23133?

No patch is currently available for CVE-2021-23133. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-23133 actively exploited?

No — CVE-2021-23133 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →