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?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2021-23133 patch availability.

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

12 total

Openwall
https://www.openwall.com/lists/oss-security/2021/04/18/2

Exploit Mailing List Patch Third Party Advisory
Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b166a20b07382b8bc1dcee2a448715c9c2c81b5b

Mailing List Patch Vendor Advisory
Openwall
http://www.openwall.com/lists/oss-security/2021/05/10/1

Mailing List Patch Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2021/05/10/2

Mailing List Patch Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2021/05/10/3

Mailing List Patch Third Party Advisory

Showing 5 of 12 references 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?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2021-23133 patch availability.
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.