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CVE-2016-9755

7.8 · HIGH

The netfilter subsystem in the Linux kernel before 4.9 mishandles IPv6 reassembly, which allows local users to cause a denial of service (integer overflow, out-of-bounds write, and GPF) or possibly…

Published Dec 28, 2016CWE-787EPSS 0.39%

Overview

CVE-2016-9755 is a high-severity vulnerability. It was published on December 28, 2016 and has a CVSS 3.0 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The netfilter subsystem in the Linux kernel before 4.9 mishandles IPv6 reassembly, which allows local users to cause a denial of service (integer overflow, out-of-bounds write, and GPF) or possibly have unspecified other impact via a crafted application that makes socket, connect, and writev system calls, related to net/ipv6/netfilter/nf_conntrack_reasm.c and net/ipv6/netfilter/nf_defrag_ipv6_hooks.c.

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=9b57da0630c9fd36ed7a20fc0f98dc82cc0777faRefwww.openwall.com/lists/oss-security/2016/12/01/10Refwww.securityfocus.com/bid/94626Refbugzilla.redhat.com/show_bug.cgi?id=1400904GitHubgithub.com/torvalds/linux/commit/9b57da0630c9fd36ed7a20fc0f98dc82cc0777faRefgroups.google.com/forum/#%21topic/syzkaller/GFbGpX7nTEoRefwww.spinics.net/lists/netdev/msg407525.htmlRefgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b57da0630c9fd36ed7a20fc0f98dc82cc0777faRefwww.openwall.com/lists/oss-security/2016/12/01/10Refwww.securityfocus.com/bid/94626

How CyberStrike helps

Frequently asked questions

What is CVE-2016-9755?

CVE-2016-9755 is a high-severity vulnerability. It was published on December 28, 2016 and has a CVSS 3.0 base score of 7.8 (HIGH).

How severe is CVE-2016-9755?

This vulnerability has a CVSS 3.0 base score of 7.8, 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-2016-9755?

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-2016-9755?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-9755 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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