CVE-2021-43267

Name: CVE-2021-43267
Creator: NVD / NIST
Published: 2021-11-02T23:15:07.487+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 57.85%

Last modified Jun 17, 2026

CVE-2021-43267 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.. EPSS estimates a 57.85% chance of exploitation in the next 30 days.

Description

An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

57.85%

99.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1284

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.10, < 5.10.77
Linux	Linux Kernel	>= 5.11, < 5.14.16
Fedoraproject	Fedora	34
Fedoraproject	Fedora	35
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H300e Firmware	All versions
Netapp	H500e Firmware	All versions
Netapp	H700e Firmware	All versions
Netapp	H410s Firmware	All versions

References

http://www.openwall.com/lists/oss-security/2022/02/10/1Exploit, Mailing List, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16Mailing List, Release Notes, Vendor Advisory
https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVWL7HZV5T5OEKJPO2D67RMFMKBBXGGB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDDEW4APTYKJK365HC2JZIVXYUV7ZRN7/
https://security.netapp.com/advisory/ntap-20211125-0002/Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/10/1Exploit, Mailing List, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16Mailing List, Release Notes, Vendor Advisory
https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVWL7HZV5T5OEKJPO2D67RMFMKBBXGGB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDDEW4APTYKJK365HC2JZIVXYUV7ZRN7/
https://security.netapp.com/advisory/ntap-20211125-0002/Third Party Advisory

Timeline

Published: Nov 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43267?

How severe is CVE-2021-43267?

CVE-2021-43267 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 57.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43267?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43267?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST