What’s Vulnerable › Vulnerabilities

CVE-2016-4805

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-05-23 · updated 2026-06-17
• Weakness: CWE-416

Description

Use-after-free vulnerability in drivers/net/ppp/ppp_generic.c in the Linux kernel before 4.5.2 allows local users to cause a denial of service (memory corruption and system crash, or spinlock) or possibly have unspecified other impact by removing a network namespace, related to the ppp_register_net_channel and ppp_unregister_channel functions.

Affected products

• Canonical Ubuntu Linux: 12.04
• Linux kernel: from 2.6.30 before 3.2.80; from 3.3 before 3.10.102; from 3.11 before 3.12.59; from 3.13 before 3.14.67; from 3.15 before 3.16.35; from 3.17 before 3.18.37 — fixed in 3.10.102, 3.12.59, 3.14.67, 3.16.35, 3.18.37, 3.2.80
• Novell Opensuse Leap: 42.1
• Novell Suse Linux Enterprise Desktop: 12.0, 12.0-sp1
• Novell Suse Linux Enterprise Live Patching: 12.0
• Novell Suse Linux Enterprise Module For Public Cloud: 12.0
• Novell Suse Linux Enterprise Real Time Extension: 11.0-sp4, 12.0-sp1
• Novell Suse Linux Enterprise Server: 11.0-sp4, 12.0, 12.0-sp1
• Novell Suse Linux Enterprise Software Development Kit: 11.0-sp4, 12.0, 12.0-sp1
• Novell Suse Linux Enterprise Workstation Extension: 12.0, 12.0-sp1
• Oracle Corporation Oracle Linux: 6
• Red Hat Enterprise Linux: 6.0, 7.0

How to fix

Upgrade to a fixed version: Linux kernel 3.10.102, 3.12.59, 3.14.67, 3.16.35. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f461dcdd296eecedaffffc6bae2bfa90bd7eb89
• http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
• http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html
• http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
• http://www.debian.org/security/2016/dsa-3607
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.2
• http://www.openwall.com/lists/oss-security/2016/05/15/2
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

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