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CVE-2020-27830

5.5 · MEDIUM

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr…

Published May 13, 2021CWE-476EPSS 0.30%

Overview

CVE-2020-27830 is a medium-severity vulnerability. It was published on May 13, 2021 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref 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

Refwww.openwall.com/lists/oss-security/2020/12/08/1Refwww.openwall.com/lists/oss-security/2020/12/08/4Refbugzilla.redhat.com/show_bug.cgi?id=1919900Reflists.debian.org/debian-lts-announce/2021/02/msg00018.htmlRefsecurity.netapp.com/advisory/ntap-20210625-0004/Refwww.debian.org/security/2021/dsa-4843Refwww.openwall.com/lists/oss-security/2020/12/08/1Refwww.openwall.com/lists/oss-security/2020/12/08/4Refbugzilla.redhat.com/show_bug.cgi?id=1919900Reflists.debian.org/debian-lts-announce/2021/02/msg00018.html

How CyberStrike helps

Frequently asked questions

What is CVE-2020-27830?

CVE-2020-27830 is a medium-severity vulnerability. It was published on May 13, 2021 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2020-27830?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-27830?

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-2020-27830?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-27830 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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