high
7.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2023-4147: Kernel: netfilter: nf_tables_newrule when adding a rule with nfta_rule_chain_id leads to use-after-free

First published: Mon Jul 24 2023(Updated: )

A flaw in the Linux Kernel found. For the netfilter, nf_tables_newrule when adding a rule with NFTA_RULE_CHAIN_ID can lead to use-after-free. Reference: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ebc1064e4874d5987722a2ddbc18f94aa53b211">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ebc1064e4874d5987722a2ddbc18f94aa53b211</a>

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

Affected SoftwareAffected VersionHow to fix
redhat/Kernel<6.5
6.5
Linux Linux kernel<6.5
Linux Linux kernel=6.5-rc1
Linux Linux kernel=6.5-rc2
Linux Linux kernel=6.5-rc3
Fedoraproject Fedora=38
Redhat Enterprise Linux=9.0
Redhat Enterprise Linux Eus=9.2
Redhat Enterprise Linux For Real Time=9.0
Redhat Enterprise Linux For Real Time For Nfv=9.0
Redhat Enterprise Linux Server Aus=9.2
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Debian Debian Linux=12.0
debian/linux
4.19.249-2
4.19.289-2
5.10.197-1
5.10.205-2
6.1.66-1
6.1.69-1
6.5.13-1
6.6.9-1
debian/linux-5.10
5.10.197-1~deb10u1

Remedy

https://access.redhat.com/security/cve/CVE-2023-4147

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=2225239

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ebc1064e4874d5987722a2ddbc18f94aa53b211

Remedy

https://www.spinics.net/lists/stable/msg671573.html

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Reference Links

Frequently Asked Questions

  • What is CVE-2023-4147?

    CVE-2023-4147 is a use-after-free flaw found in the Linux kernel's Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID.

  • How does CVE-2023-4147 impact the system?

    CVE-2023-4147 allows a local user to crash or escalate their privileges on the system.

  • What is the severity of CVE-2023-4147?

    CVE-2023-4147 has a severity rating of 7.8 (High).

  • Which software are affected by CVE-2023-4147?

    Linux kernel versions 6.5 and earlier, Fedora 38, and Redhat Enterprise Linux 9.0 are affected by CVE-2023-4147.

  • How do I fix CVE-2023-4147?

    Apply the recommended patches and updates provided by the respective vendors to mitigate CVE-2023-4147.

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