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CVE-2015-8543

7.0 · HIGH

The networking implementation in the Linux kernel through 4.3.3, as used in Android and other products, does not validate protocol identifiers for certain protocol families, which allows local user…

Published Dec 28, 2015linuxEPSS 1.22%

Overview

CVE-2015-8543 is a high-severity vulnerability affecting linux linux_kernel. It was published on December 28, 2015 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The networking implementation in the Linux kernel through 4.3.3, as used in Android and other products, does not validate protocol identifiers for certain protocol families, which allows local users to cause a denial of service (NULL function pointer dereference and system crash) or possibly gain privileges by leveraging CLONE_NEWUSER support to execute a crafted SOCK_RAW application.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 0, < 3.2.75Affected

References

Refgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79462ad02e861803b3840cc782248c7359451cd9Reflists.opensuse.org/opensuse-security-announce/2016-03/msg00094.htmlReflists.opensuse.org/opensuse-security-announce/2016-04/msg00045.htmlReflists.opensuse.org/opensuse-security-announce/2016-08/msg00038.htmlRefrhn.redhat.com/errata/RHSA-2016-0855.htmlRefrhn.redhat.com/errata/RHSA-2016-2574.htmlRefrhn.redhat.com/errata/RHSA-2016-2584.htmlRefwww.debian.org/security/2015/dsa-3426Refwww.debian.org/security/2016/dsa-3434Refwww.openwall.com/lists/oss-security/2015/12/09/5

How CyberStrike helps

Frequently asked questions

What is CVE-2015-8543?

CVE-2015-8543 is a high-severity vulnerability affecting linux linux_kernel. It was published on December 28, 2015 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2015-8543?

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2015-8543?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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-2015-8543?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-8543 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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