Description
The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.
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 | 4.11.11-1 | — |
| Debian 13 | linux | 4.11.11-1 | — |
| Debian 12 | linux | 4.11.11-1 | — |
| Debian 9 | linux | 4.9.30-2+deb9u3 | DSA-3927-1 |
| Debian 8 | linux | 3.16.43-2+deb8u3 | DSA-3945-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | linux | 3.2.93-1 | DLA-1099-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-gcp-6.11 +4 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-93.116 | USN-3405-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1032.41 | USN-3405-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.10.0-1008.8 | USN-3468-3 |
| Ubuntu 16.04 LTS | linux-gke | 4.4.0-1028.28 | USN-3405-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-32.35~16.04.1 | USN-3468-2 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1071.79 | USN-3405-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1073.78 | USN-3405-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-135.184 | USN-3470-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-93.116~14.04.1 | USN-3405-2 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | 3.10.0-693.5.2.rt56.626.el7 | RHSA-2017:2931 |
| RHEL 7 | perf +18 | 3.10.0-693.5.2.el7 | RHSA-2017:2930 |
| RHEL 6 | perf +16 | 2.6.32-696.20.1.el6 | RHSA-2018:0169 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 ELS | kernel +12 | 2.6.18-436.el5 | RHSA-2018:3822 |
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-693.5.2.rt56.592.el6rt | RHSA-2017:2918 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.63.1 | SUSE-SU-2017:2908-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_22 | 1-2.1 | SUSE-SU-2017:2908-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.101.1 | SUSE-SU-2017:2920-1, SUSE-SU-2017:2908-1 |
| SLES 12 | kgraft-patch-SLE12_Update_28 | 1-8.1 | SUSE-SU-2017:2920-1 |
| SLES 11 SP4 | cluster-network | 1.4-2.32.2.14 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | drbd | 8.4.4-0.27.2.1 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | drbd-kmp | 8.4.4-0.27.2.13 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | gfs2 | 2-0.24.2.14 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-108.7.2 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.7.1 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | ocfs2 | 1.6-0.28.3.4 | SUSE-SU-2017:2389-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.5.1 | SUSE-SU-2017:2525-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.63.1 | SUSE-SU-2017:2908-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_22 | 1-2.1 | SUSE-SU-2017:2908-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.7.1 | SUSE-SU-2017:2389-1 |
| SLE Real Time 11 SP4 | cluster-network | 1.4-2.32.2.14 | SUSE-SU-2017:2389-1 |
| SLE Real Time 11 SP4 | drbd-kmp | 8.4.4-0.27.2.13 | SUSE-SU-2017:2389-1 |
| SLE Real Time 11 SP4 | gfs2 | 2-0.24.2.14 | SUSE-SU-2017:2389-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.5.1 | SUSE-SU-2017:2342-1 |
| SLE Real Time 11 SP4 | ocfs2 | 1.6-0.28.3.4 | SUSE-SU-2017:2389-1 |
| SUSE OpenStack Cloud 6 | kernel-xen +3 | 3.12.74-60.64.63.1 | SUSE-SU-2017:2908-1 |
| SUSE OpenStack Cloud 6 | kgraft-patch-SLE12-SP1_Update_22 | 1-2.1 | SUSE-SU-2017:2908-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.5.1 | SUSE-SU-2017:2525-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.19.10.el6uek | 0.4.5-3.el6 | ELSA-2017-3632 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.19.10.el7uek | 0.4.5-3.el7 | ELSA-2017-3632 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.19.10.el7uek | ELSA-2017-3632 |
| Oracle Linux 7 | perf +11 | 3.10.0-693.5.2.el7 | ELSA-2017-2930 |
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.
Exploit-DB 1
- Linux Kernel < 4.11.8 - 'mq_notify: double sock_put()' Local Privilege Escalation EDB-45553 · local · Oct 2, 2018
GitHub 6 repositories
-
lexfo/cve-2017-11176 ★ 26 · Oct 2, 2018
-
c3r34lk1ll3r/CVE-2017-11176 ★ 1 · Apr 10, 2020
Code execution for CVE-2017-11176
-
Yanoro/CVE-2017-11176 ★ 0 · Feb 8, 2024
-
Sama-Ayman-Mokhtar/CVE-2017-11176 ★ 0 · Jul 5, 2022
mq_notify: double sock_put()
-
leonardo1101/cve-2017-11176 ★ 0 · Oct 23, 2019
-
DoubleMice/cve-2017-11176 ★ 0 · Nov 13, 2018
My first try to code my own LPE exploit.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 20
- RHSA-2017:2931 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:2918 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:2930 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:3822 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0169 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3405-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3405-1 linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3470-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3945-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3927-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1099-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3468-2 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3468-3 linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:2389-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2525-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2908-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2920-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2342-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-3632 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 24, 2017
- ELSA-2017-2930 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 19, 2017
References
- DSA-3927 vendor-advisory
- RHSA-2018:0169 vendor-advisory
- RHSA-2017:2918 vendor-advisory
- RHSA-2017:2931 vendor-advisory
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- 99919 vdb-entry
- https://github.com/torvalds/linux/commit/f991af3daabaecff34684fd51fac80319d1baad1
- DSA-3945 vendor-advisory
- 45553 exploit
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f991af3daabaecff34684fd51fac80319d1baad1
- RHSA-2018:3822 vendor-advisory
- RHSA-2017:2930 vendor-advisory