What’s Vulnerable › Vulnerabilities

CVE-2016-8632

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-11-28 · updated 2026-06-17
• Weakness: CWE-119

Description

The tipc_msg_build function in net/tipc/msg.c in the Linux kernel through 4.8.11 does not validate the relationship between the minimum fragment length and the maximum packet size, which allows local users to gain privileges or cause a denial of service (heap-based buffer overflow) by leveraging the CAP_NET_ADMIN capability.

Affected products

• Linux kernel: from 2.6.16 before 3.2.85; from 3.3 before 3.16.40; from 3.17 before 4.1.37; from 4.2 before 4.4.65; from 4.5 before 4.8.14 — fixed in 3.16.40, 3.2.85, 4.1.37, 4.4.65, 4.8.14

How to fix

Upgrade to a fixed version: Linux kernel 3.16.40, 3.2.85, 4.1.37, 4.4.65. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2016/11/08/5
• http://www.securityfocus.com/bid/94211
• https://bugzilla.redhat.com/show_bug.cgi?id=1390832
• https://www.mail-archive.com/netdev%40vger.kernel.org/msg133205.html
• http://www.openwall.com/lists/oss-security/2016/11/08/5
• http://www.securityfocus.com/bid/94211
• https://bugzilla.redhat.com/show_bug.cgi?id=1390832
• https://www.mail-archive.com/netdev%40vger.kernel.org/msg133205.html

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