CVE-2016-4805

CVE-2016-4805 is a high-severity vulnerability in Novell Suse Linux Enterprise Workstation Extension with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

• Severity: High (CVSS 3.x base score 7.8)
• CVSS v2: 7.2
• EPSS exploit prediction: 0% (38th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-416
• Affected product: Novell Suse Linux Enterprise Workstation Extension
• Published: 2016-05-23
• Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2016-4805?

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.

How severe is CVE-2016-4805?

CVE-2016-4805 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-4805 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4805?

CVE-2016-4805 primarily affects Novell Suse Linux Enterprise Workstation Extension. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4805?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-4805 published?

CVE-2016-4805 was published on 2016-05-23 and last updated on 2026-06-17.

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
• http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
• http://www.securityfocus.com/bid/90605
• http://www.securitytracker.com/id/1036763
• http://www.ubuntu.com/usn/USN-3021-1
• http://www.ubuntu.com/usn/USN-3021-2
• https://bugzilla.redhat.com/show_bug.cgi?id=1335803
• https://github.com/torvalds/linux/commit/1f461dcdd296eecedaffffc6bae2bfa90bd7eb89

Affected products (20)

• cpe:2.3:o:novell:suse_linux_enterprise_desktop:12.0:-:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_linux_enterprise_workstation_extension:12.0:-:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_linux_enterprise_module_for_public_cloud:12.0:-:*:*:*:*:*:*
• cpe:2.3:o:novell:suse_linux_enterprise_server:11.0:sp4:*:*:*:*:*:*
• cpe:2.3:o:novell:opensuse_leap:42.1:*:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:11.0:sp4:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.04:-:lts:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:12.0:-:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_linux_enterprise_workstation_extension:12.0:sp1:*:*:*:*:*:*
• cpe:2.3:o:novell:suse_linux_enterprise_server:12.0:-:*:*:*:*:*:*
• cpe:2.3:o:novell:suse_linux_enterprise_desktop:12.0:sp1:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*
• cpe:2.3:o:novell:suse_linux_enterprise_real_time_extension:11.0:sp4:*:*:*:*:*:*
• cpe:2.3:o:novell:suse_linux_enterprise_server:12.0:sp1:*:*:*:*:*:*
• cpe:2.3:o:novell:suse_linux_enterprise_real_time_extension:12.0:sp1:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:12.0:sp1:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_linux_enterprise_live_patching:12.0:-:*:*:*:*:*:*

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Other CWE-416 (Use After Free) vulnerabilities

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• CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
• CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
• CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
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