HOME VULNERABILITIESCVE-2016-4805

HIGH

CVE-2016-4805

CWE-416Published: May 23, 2016· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official 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.

Technical Analysis

CVE-2016-4805 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Canonical1 product(s)

ubuntu linux

Linux1 product(s)

linux kernel

novell8 product(s)

suse linux enterprise desktopsuse linux enterprise workstation extensionsuse linux enterprise module for public cloudsuse linux enterprise serveropensuse leapsuse linux enterprise software development kitsuse linux enterprise real time extensionsuse linux enterprise live patching

Oracle1 product(s)

linux

Red Hat1 product(s)

enterprise linux

Source: NVD CPE · 16 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f461dcdd296eecedaffffc6bae2bfa90bd7eb89

PATCHhttp://www.openwall.com/lists/oss-security/2016/05/15/2

PATCHhttps://github.com/torvalds/linux/commit/1f461dcdd296eecedaffffc6bae2bfa90bd7eb89

PATCHhttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f461dcdd296eecedaffffc6bae2bfa90bd7eb89

PATCHhttp://www.openwall.com/lists/oss-security/2016/05/15/2

PATCHhttps://github.com/torvalds/linux/commit/1f461dcdd296eecedaffffc6bae2bfa90bd7eb89

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html

ADVISORYhttp://www.debian.org/security/2016/dsa-3607

ADVISORYhttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.2

ADVISORYhttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

ADVISORYhttp://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html

ADVISORYhttp://www.securityfocus.com/bid/90605

ADVISORYhttp://www.securitytracker.com/id/1036763

ADVISORYhttp://www.ubuntu.com/usn/USN-3021-1

ADVISORYhttp://www.ubuntu.com/usn/USN-3021-2

ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1335803

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html

ADVISORYhttp://www.debian.org/security/2016/dsa-3607

ADVISORYhttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.2

ADVISORYhttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

ADVISORYhttp://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html

ADVISORYhttp://www.securityfocus.com/bid/90605

ADVISORYhttp://www.securitytracker.com/id/1036763

ADVISORYhttp://www.ubuntu.com/usn/USN-3021-1

ADVISORYhttp://www.ubuntu.com/usn/USN-3021-2

ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1335803

All References (38)

→

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f461dcdd296eecedaffffc6bae2bfa90bd7eb89Patch · Vendor Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.htmlMailing List · Release Notes · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.htmlMailing List · Release Notes · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.htmlMailing List · Release Notes · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.htmlMailing List · Third Party Advisory

→

http://www.debian.org/security/2016/dsa-3607Third Party Advisory

→

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.2Mailing List · Vendor Advisory

→

http://www.openwall.com/lists/oss-security/2016/05/15/2Mailing List · Patch · Third Party Advisory

→

http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlThird Party Advisory

→

http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.htmlThird Party Advisory

→

http://www.securityfocus.com/bid/90605Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1036763Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2016-4805

CVSS Score7.8 / 10

SeverityHIGH

WeaknessCWE-416

CISA KEVNo

Affected5 vendor(s)

PublishedMay 23, 2016

Related CVEs (CWE-416)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2016-4805 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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