Description
The IPT_SO_SET_REPLACE setsockopt implementation in the netfilter subsystem in the Linux kernel before 4.6 allows local users to cause a denial of service (out-of-bounds read) or possibly obtain sensitive information from kernel heap memory by leveraging in-container root access to provide a crafted offset value that leads to crossing a ruleset blob boundary.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.6.2-2 | — |
| Debian 13 | linux | 4.6.2-2 | — |
| Debian 12 | linux | 4.6.2-2 | — |
| Debian 8 | linux | 3.16.7-ckt25-2+deb8u2 | DSA-3607-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-28.47 | USN-3016-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1016.22 | USN-3016-2 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1019.22 | USN-3016-3 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-91.138 | USN-3018-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-76.98~14.04.1 | USN-3019-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-64.72~14.04.1 | USN-3020-1 |
| Ubuntu 14.04 LTS | linux-lts-wily | 4.2.0-41.48~14.04.1 | USN-3017-3 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-28.47~14.04.1 | USN-3016-4 |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-327.36.1.rt56.237.el7 | RHSA-2016:1875 |
| RHEL 7 | perf +18 | 3.10.0-327.36.1.el7 | RHSA-2016:1847 |
| RHEL 6 | perf +16 | 2.6.32-642.13.1.el6 | RHSA-2017:0036 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-327.rt56.197.el6rt | RHSA-2016:1883 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 4.8.13-1.1 | openSUSE-SU-2024:10128-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.11.2.el6uek | 0.4.5-3.el6 | ELSA-2016-3617 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.11.2.el7uek | 0.4.5-3.el7 | ELSA-2016-3617 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.10.el6uek | 0.5.3-2.el6 | ELSA-2016-3619 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.10.el7uek | 0.5.3-2.el7 | ELSA-2016-3619 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.11.2.el7uek | ELSA-2016-3619, ELSA-2016-3617 |
| Oracle Linux 7 | perf +11 | 3.10.0-327.36.1.el7 | ELSA-2016-1847 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
Linux Kernel 4.6.3 Netfilter Privilege Escalation
exploit/linux/local/netfilter_priv_esc_ipv4
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 18
- RHSA-2017:0036 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:1883 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:1875 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:1847 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3016-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3018-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3607-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3019-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3020-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3016-2 linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3016-3 linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3016-4 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3017-3 linux-lts-wily vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10128-1 kernel-debug-4.8.13-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0144 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 17, 2024
- ELSA-2016-3619 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 22, 2016
- ELSA-2016-3617 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 22, 2016
- ELSA-2016-1847 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 14, 2016
References
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- USN-3017-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- USN-3017-3 vendor-advisory
- RHSA-2016:1847 vendor-advisory
- openSUSE-SU-2016:2184 vendor-advisory
- USN-3018-2 vendor-advisory
- USN-3017-2 vendor-advisory
- RHSA-2016:1875 vendor-advisory
- USN-3019-1 vendor-advisory
- DSA-3607 vendor-advisory
- USN-3016-2 vendor-advisory
- USN-3016-1 vendor-advisory
- [oss-security] 20160624 Linux CVE-2016-4997 (local privilege escalation) and CVE-2016-4998 (out of bounds memory access) mailing-list
- USN-3018-1 vendor-advisory
- 1036171 vdb-entry
- https://github.com/torvalds/linux/commit/6e94e0cfb0887e4013b3b930fa6ab1fe6bb6ba91
- https://bugzilla.redhat.com/show_bug.cgi?id=1349886
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6e94e0cfb0887e4013b3b930fa6ab1fe6bb6ba91
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- RHSA-2016:1883 vendor-advisory
- SUSE-SU-2016:2105 vendor-advisory
- USN-3016-3 vendor-advisory
- RHSA-2017:0036 vendor-advisory
- USN-3016-4 vendor-advisory
- 91451 vdb-entry
- USN-3020-1 vendor-advisory