medium
5.5
CWE
362
Advisory Published
CVE Published
Updated

CVE-2023-42756: Kernel: netfilter: race condition between ipset_cmd_add and ipset_cmd_swap

First published: Wed Sep 20 2023(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.6
6.6
IBM InfoSphere Guardium z/OS<=12.0
Linux kernel<6.6
Linux kernel=6.6-rc1
Linux kernel=6.6-rc2
Red Hat Enterprise Linux=9.0
Debian=10.0
Fedora=37
Fedora=38
Fedora=39
debian/linux
5.10.223-1
5.10.234-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.16-1

Remedy

https://access.redhat.com/security/cve/CVE-2023-42756

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=2239848

Remedy

https://seclists.org/oss-sec/2023/q3/242

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-42756?

    CVE-2023-42756 has the potential to cause a kernel panic, indicating a high severity due to its impact on system stability.

  • How do I fix CVE-2023-42756?

    To mitigate CVE-2023-42756, upgrade to kernel version 6.6 or apply the necessary patches provided by your distribution.

  • What systems are affected by CVE-2023-42756?

    CVE-2023-42756 affects various Linux distributions, including versions of the Linux kernel prior to 6.6.

  • Can CVE-2023-42756 be exploited remotely?

    No, CVE-2023-42756 is a local vulnerability that requires a user with local access to exploit it.

  • What is the nature of the issue in CVE-2023-42756?

    CVE-2023-42756 is caused by a race condition in the Netfilter subsystem that can lead to a kernel panic.

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