CVE-2023-2156

Name: CVE-2023-2156
Creator: NVD / NIST
Published: 2023-05-09T22:15:10.133+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 6.13%

Last modified Jun 17, 2026

CVE-2023-2156 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in the networking subsystem of the Linux kernel within the handling of the RPL protocol. This issue results from the lack of proper handling of user-supplied data, which can lead to an assertion failure. EPSS estimates a 6.13% chance of exploitation in the next 30 days.

Description

A flaw was found in the networking subsystem of the Linux kernel within the handling of the RPL protocol. This issue results from the lack of proper handling of user-supplied data, which can lead to an assertion failure. This may allow an unauthenticated remote attacker to create a denial of service condition on the system.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

6.13%

92.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.7, < 5.10.184
Linux	Linux Kernel	>= 5.11, < 5.15.117
Linux	Linux Kernel	>= 5.16, < 6.1.34
Linux	Linux Kernel	>= 6.2, < 6.2.13
Linux	Linux Kernel	>= 6.3, < 6.3.8
Redhat	Enterprise Linux	9.0
Fedoraproject	Fedora	38
Debian	Debian Linux	10.0

References

http://www.openwall.com/lists/oss-security/2023/05/17/8Mailing List
http://www.openwall.com/lists/oss-security/2023/05/17/9Mailing List
http://www.openwall.com/lists/oss-security/2023/05/18/1Mailing List
http://www.openwall.com/lists/oss-security/2023/05/19/1Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=2196292Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00001.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230622-0001/Mailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5448Third Party Advisory, VDB Entry
https://www.debian.org/security/2023/dsa-5453Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-23-547/Third Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2023/05/17/8Mailing List
http://www.openwall.com/lists/oss-security/2023/05/17/9Mailing List
http://www.openwall.com/lists/oss-security/2023/05/18/1Mailing List
http://www.openwall.com/lists/oss-security/2023/05/19/1Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=2196292Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00001.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230622-0001/Mailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5448Third Party Advisory, VDB Entry
https://www.debian.org/security/2023/dsa-5453Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-23-547/Third Party Advisory, VDB Entry

Timeline

Published: May 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-2156?

How severe is CVE-2023-2156?

CVE-2023-2156 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 6.13% probability of exploitation in the next 30 days.

How do I fix CVE-2023-2156?

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-2023-2156?

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

Scan your code now

Source: NVD / NIST