CVE-2016-8655
Race condition in net/packet/af_packet.c in the Linux kernel through 4.8.12 allows local users to gain privileges or cause a denial of service (use-after-free) by leveraging the CAP_NET_RAW capability to change a socket version, related to the packet_set_ring and packet_setsockopt functions.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Base score: 7.8
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 11%
- Percentile among all scored CVEs: 96
- Score date: 10/11/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
💥 Public exploits
Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
- Metasploit module (reliable, widely available exploit) · AF_PACKET chocobo_root Privilege Escalation
- Published on Exploit-DB · Linux Kernel 4.4.0-21 < 4.4.0-51 (Ubuntu 14.04/16.04 x64) - 'AF_PACKET' Race Condition Privilege Escalation (12/29/2018)
- Published on Exploit-DB · Linux 4.4.0 < 4.4.0-53 - 'AF_PACKET chocobo_root' Local Privilege Escalation (Metasploit) (5/22/2018)
- Published on Exploit-DB · Linux Kernel 4.4.0 (Ubuntu 14.04/16.04 x86-64) - 'AF_PACKET' Race Condition Privilege Escalation (12/6/2016)
- Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub
⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.
Affected technologies (2)
CWEs
- CWE-362, CWE-416
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=84ac7260236a49c79eede91617700174c2c19b0c
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00056.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00070.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00073.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00076.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00077.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00087.html
- http://packetstormsecurity.com/files/140063/Linux-Kernel-4.4.0-AF_PACKET-Race-Condition-Privilege-Escalation.html
- http://rhn.redhat.com/errata/RHSA-2017-0386.html
- http://rhn.redhat.com/errata/RHSA-2017-0387.html
- http://rhn.redhat.com/errata/RHSA-2017-0402.html
- http://www.openwall.com/lists/oss-security/2016/12/06/1
- http://www.securityfocus.com/bid/94692
- http://www.securitytracker.com/id/1037403
- http://www.securitytracker.com/id/1037968
- http://www.ubuntu.com/usn/USN-3149-1
- http://www.ubuntu.com/usn/USN-3149-2
- http://www.ubuntu.com/usn/USN-3150-1
- http://www.ubuntu.com/usn/USN-3150-2
- http://www.ubuntu.com/usn/USN-3151-1
- http://www.ubuntu.com/usn/USN-3151-2
- http://www.ubuntu.com/usn/USN-3151-3
- http://www.ubuntu.com/usn/USN-3151-4
- http://www.ubuntu.com/usn/USN-3152-1
- http://www.ubuntu.com/usn/USN-3152-2
- https://bugzilla.redhat.com/show_bug.cgi?id=1400019
- https://github.com/torvalds/linux/commit/84ac7260236a49c79eede91617700174c2c19b0c
- https://source.android.com/security/bulletin/2017-03-01.html
- https://www.exploit-db.com/exploits/40871/
- https://www.exploit-db.com/exploits/44696/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=84ac7260236a49c79eede91617700174c2c19b0c
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00056.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00070.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00073.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00076.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00077.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00087.html
- http://packetstormsecurity.com/files/140063/Linux-Kernel-4.4.0-AF_PACKET-Race-Condition-Privilege-Escalation.html
- http://rhn.redhat.com/errata/RHSA-2017-0386.html
- http://rhn.redhat.com/errata/RHSA-2017-0387.html
- http://rhn.redhat.com/errata/RHSA-2017-0402.html
- http://www.openwall.com/lists/oss-security/2016/12/06/1
- http://www.securityfocus.com/bid/94692
- http://www.securitytracker.com/id/1037403
- http://www.securitytracker.com/id/1037968
- http://www.ubuntu.com/usn/USN-3149-1
- http://www.ubuntu.com/usn/USN-3149-2
- http://www.ubuntu.com/usn/USN-3150-1
- http://www.ubuntu.com/usn/USN-3150-2
- http://www.ubuntu.com/usn/USN-3151-1
- http://www.ubuntu.com/usn/USN-3151-2
- http://www.ubuntu.com/usn/USN-3151-3
- http://www.ubuntu.com/usn/USN-3151-4
- http://www.ubuntu.com/usn/USN-3152-1
- http://www.ubuntu.com/usn/USN-3152-2
- https://bugzilla.redhat.com/show_bug.cgi?id=1400019
- https://github.com/torvalds/linux/commit/84ac7260236a49c79eede91617700174c2c19b0c
- https://source.android.com/security/bulletin/2017-03-01.html
- https://www.exploit-db.com/exploits/40871/
- https://www.exploit-db.com/exploits/44696/
Raw JSON (NVD)
Show
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