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CVE-2018-12232

5.9 · MEDIUM

In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and so…

Published Jun 12, 2018CWE-362EPSS 6.53%

Overview

CVE-2018-12232 is a medium-severity vulnerability. It was published on June 12, 2018 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.

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/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14Refwww.securityfocus.com/bid/104453Refaccess.redhat.com/errata/RHSA-2018:2948GitHubgithub.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14Reflkml.org/lkml/2018/6/5/14Refpatchwork.ozlabs.org/patch/926519/Refusn.ubuntu.com/3752-1/Refusn.ubuntu.com/3752-2/Refusn.ubuntu.com/3752-3/Refgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14

How CyberStrike helps

Frequently asked questions

What is CVE-2018-12232?

CVE-2018-12232 is a medium-severity vulnerability. It was published on June 12, 2018 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

How severe is CVE-2018-12232?

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-12232?

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-2018-12232?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-12232 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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