What’s Vulnerable › Vulnerabilities

CVE-2016-3841

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-08-06 · updated 2026-06-17
• Weakness: CWE-264

Description

The IPv6 stack in the Linux kernel before 4.3.3 mishandles options data, which allows local users to gain privileges or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call.

Affected products

• Android: 6.0.1
• Linux kernel: before 3.2.75; from 3.3 before 3.12.52; from 3.13 before 3.16.35; from 3.17 before 3.18.25; from 3.19 before 4.1.15; from 4.2 before 4.2.8 — fixed in 3.12.52, 3.16.35, 3.18.25, 3.2.75, 4.1.15, 4.2.8

How to fix

Upgrade to a fixed version: Linux kernel 3.12.52, 3.16.35, 3.18.25, 3.2.75. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=45f6fad84cc305103b28d73482b344d7f5b76f39
• http://rhn.redhat.com/errata/RHSA-2016-0855.html
• http://rhn.redhat.com/errata/RHSA-2016-2574.html
• http://rhn.redhat.com/errata/RHSA-2016-2584.html
• http://rhn.redhat.com/errata/RHSA-2016-2695.html
• http://source.android.com/security/bulletin/2016-08-01.html
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.3
• http://www.securityfocus.com/bid/92227
• https://github.com/torvalds/linux/commit/45f6fad84cc305103b28d73482b344d7f5b76f39
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=45f6fad84cc305103b28d73482b344d7f5b76f39
• http://rhn.redhat.com/errata/RHSA-2016-0855.html
• http://rhn.redhat.com/errata/RHSA-2016-2574.html

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