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CVE-2023-6111

7.8 · HIGH

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.

Published Nov 14, 2023CWE-416EPSS 0.32%

Overview

CVE-2023-6111 is a high-severity vulnerability. It was published on November 14, 2023 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.

The function nft_trans_gc_catchall did not remove the catchall set element from the catchall_list when the argument sync is true, making it possible to free a catchall set element many times.

We recommend upgrading past commit 93995bf4af2c5a99e2a87f0cd5ce547d31eb7630.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93995bf4af2c5a99e2a87f0cd5ce547d31eb7630Refkernel.dance/93995bf4af2c5a99e2a87f0cd5ce547d31eb7630Reflists.fedoraproject.org/archives/list/[email protected]/message/3OXWBKK7RTQOGGDLQGCZFS753VLGS2GD/Reflists.fedoraproject.org/archives/list/[email protected]/message/3S55P23EYAWDHXZPJEVTGIRZZRICYI3Z/Reflists.fedoraproject.org/archives/list/[email protected]/message/IG6IF3FUY7LVZJMFRPANAU4L4PSJ3ESQ/Reflists.fedoraproject.org/archives/list/[email protected]/message/YQ7JVDEDZV5SNHG5EW7RHKK2ZN56HSGB/Refgit.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93995bf4af2c5a99e2a87f0cd5ce547d31eb7630Refkernel.dance/93995bf4af2c5a99e2a87f0cd5ce547d31eb7630Reflists.fedoraproject.org/archives/list/[email protected]/message/3OXWBKK7RTQOGGDLQGCZFS753VLGS2GD/Reflists.fedoraproject.org/archives/list/[email protected]/message/3S55P23EYAWDHXZPJEVTGIRZZRICYI3Z/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-6111?

CVE-2023-6111 is a high-severity vulnerability. It was published on November 14, 2023 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-6111?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-6111?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-6111?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-6111 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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