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CVE-2019-19770

8.2 · HIGH

In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously create…

Published Dec 12, 2019CWE-416EPSS 2.45%

Overview

CVE-2019-19770 is a high-severity vulnerability. It was published on December 12, 2019 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace

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/2020-04/msg00035.htmlRefbugzilla.kernel.org/show_bug.cgi?id=205713Reflists.debian.org/debian-lts-announce/2020/12/msg00015.htmlReflore.kernel.org/linux-block/20200402000002.7442-1-mcgrof%40kernel.org/Refsecurity.netapp.com/advisory/ntap-20200103-0001/Reflists.opensuse.org/opensuse-security-announce/2020-04/msg00035.htmlRefbugzilla.kernel.org/show_bug.cgi?id=205713Reflists.debian.org/debian-lts-announce/2020/12/msg00015.htmlReflore.kernel.org/linux-block/20200402000002.7442-1-mcgrof%40kernel.org/Refsecurity.netapp.com/advisory/ntap-20200103-0001/

How CyberStrike helps

Frequently asked questions

What is CVE-2019-19770?

CVE-2019-19770 is a high-severity vulnerability. It was published on December 12, 2019 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2019-19770?

This vulnerability has a CVSS 3.1 base score of 8.2, 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-2019-19770?

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-2019-19770?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-19770 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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