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CVE-2016-0821

5.5 · MEDIUM

The LIST_POISON feature in include/linux/poison.h in the Linux kernel before 4.3, as used in Android 6.0.1 before 2016-03-01, does not properly consider the relationship to the mmap_min_addr value,…

Published Mar 12, 2016CWE-908EPSS 0.38%

Overview

CVE-2016-0821 is a medium-severity vulnerability. It was published on March 12, 2016 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

The LIST_POISON feature in include/linux/poison.h in the Linux kernel before 4.3, as used in Android 6.0.1 before 2016-03-01, does not properly consider the relationship to the mmap_min_addr value, which makes it easier for attackers to bypass a poison-pointer protection mechanism by triggering the use of an uninitialized list entry, aka Android internal bug 26186802, a different vulnerability than CVE-2015-3636.

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=8a5e5e02fc83aaf67053ab53b359af08c6c49aafRefsource.android.com/security/bulletin/2016-03-01.htmlRefwww.debian.org/security/2016/dsa-3607Refwww.openwall.com/lists/oss-security/2015/05/02/6Refwww.securityfocus.com/bid/84260Refwww.ubuntu.com/usn/USN-2967-1Refwww.ubuntu.com/usn/USN-2967-2Refwww.ubuntu.com/usn/USN-2968-1Refwww.ubuntu.com/usn/USN-2968-2Refwww.ubuntu.com/usn/USN-2969-1

How CyberStrike helps

Frequently asked questions

What is CVE-2016-0821?

CVE-2016-0821 is a medium-severity vulnerability. It was published on March 12, 2016 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2016-0821?

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-2016-0821?

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-2016-0821?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-0821 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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