CVE-2023-42756

MEDIUM

Linux Kernel < 6.6 - Denial of Service via Netfilter IPSET Race Condition

Title source: llm
STIX 2.1

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.

References (8)

Core 8
Core References
Exploit, Mailing List, Patch, Third Party Advisory
https://seclists.org/oss-sec/2023/q3/242
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:2394
Patch, Third Party Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2023-42756
Exploit, Issue Tracking, Patch, Third Party Advisory issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2239848

Scores

CVSS v3 4.4
EPSS 0.0000
EPSS Percentile 0.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-362
Status published
Products (7)
debian/debian_linux 10.0
fedoraproject/fedora 37
fedoraproject/fedora 38
fedoraproject/fedora 39
linux/linux_kernel 6.6 rc1 (2 CPE variants)
linux/linux_kernel < 6.6
redhat/enterprise_linux 9.0
Published Sep 28, 2023
Tracked Since Feb 18, 2026