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CVE-2019-15538

7.5 · HIGH

An issue was discovered in xfs_setattr_nonsize in fs/xfs/xfs_iops.c in the Linux kernel through 5.2.9.

Published Aug 25, 2019CWE-400EPSS 3.92%

Overview

CVE-2019-15538 is a high-severity vulnerability. It was published on August 25, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in xfs_setattr_nonsize in fs/xfs/xfs_iops.c in the Linux kernel through 5.2.9. XFS partially wedges when a chgrp fails on account of being out of disk quota. xfs_setattr_nonsize is failing to unlock the ILOCK after the xfs_qm_vop_chown_reserve call fails. This is primarily a local DoS attack vector, but it might result as well in remote DoS if the XFS filesystem is exported for instance via NFS.

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

Reflists.opensuse.org/opensuse-security-announce/2019-09/msg00064.htmlReflists.opensuse.org/opensuse-security-announce/2019-09/msg00066.htmlRefgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1fb254aa983bf190cfd685d40c64a480a9bafaeeGitHubgithub.com/torvalds/linux/commit/1fb254aa983bf190cfd685d40c64a480a9bafaeeReflists.debian.org/debian-lts-announce/2019/09/msg00014.htmlReflists.debian.org/debian-lts-announce/2019/09/msg00015.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3RUDQJXRJQVGHCGR4YZWTQ3ECBI7TXH/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4JZ6AEUKFWBHQAROGMQARJ274PQP2QP/Reflore.kernel.org/linux-xfs/20190823035528.GH1037422%40magnolia/Reflore.kernel.org/linux-xfs/20190823192433.GA8736%40eldamar.local

How CyberStrike helps

Frequently asked questions

What is CVE-2019-15538?

CVE-2019-15538 is a high-severity vulnerability. It was published on August 25, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2019-15538?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-15538?

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-2019-15538?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-15538 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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