CVE-2023-42756

Name: CVE-2023-42756
Creator: NVD / NIST
Published: 2023-09-28T14:15:21.037+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2023-42756 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. This issue may allow a local user to crash the system.

Metrics

CVSS 3.1

4.7/10

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

EPSS Probability

0.28%

19.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	< 6.6	—
Linux	Linux Kernel	6.6	Rc1
Redhat	Enterprise Linux	9.0	—
Debian	Debian Linux	10.0	—
Fedoraproject	Fedora	37	—
Fedoraproject	Fedora	38	—
Fedoraproject	Fedora	39	—

References

https://access.redhat.com/errata/RHSA-2024:2394
https://access.redhat.com/security/cve/CVE-2023-42756Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2239848Exploit, Issue Tracking, Patch, Third Party Advisory
https://seclists.org/oss-sec/2023/q3/242Exploit, Mailing List, Patch, Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2394
https://access.redhat.com/security/cve/CVE-2023-42756Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2239848Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GISYSL3F6WIEVGHJGLC2MFNTUXHPTKQH/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GPMICQ2HVZO5UAM5KPXHAZKA2U3ZDOO6/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V5PDNWPKAP3WL5RQZ4RIDS6MG32OHH5R/
https://seclists.org/oss-sec/2023/q3/242Exploit, Mailing List, Patch, Third Party Advisory

Timeline

Published: Sep 28, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-42756?

How severe is CVE-2023-42756?

CVE-2023-42756 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2023-42756?

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-2023-42756?

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

Scan your code now

Source: NVD / NIST