Description
An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels before 4.9.187.
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 | 4.11.6-1 | — |
| Debian 13 | linux | 4.11.6-1 | — |
| Debian 12 | linux | 4.11.6-1 | — |
| Debian 9 | linux | 4.9.168-1+deb9u5 | DSA-4497-1 |
| Debian 8 | linux | 3.16.72-1 | DLA-1884-1 |
| Debian 8 | linux-4.9 | 4.9.168-1+deb9u5~deb8u1 | DLA-1885-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | linux-vmware | No fix yet | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1053.57 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-165.193 | USN-4145-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1095.106 | USN-4145-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1002.5 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-32.35~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1059.66 | USN-4145-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1123.132 | USN-4145-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1127.135 | USN-4145-1 |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1022.27 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1055.59 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-165.193~14.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.125.1 | SUSE-SU-2019:2984-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_33 | 1-3.5.1 | SUSE-SU-2019:2984-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.124.1 | SUSE-SU-2019:2950-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_37 | 1-2.3.1 | SUSE-SU-2019:2950-1 |
| SLES 12 | kernel-ec2 | 3.12.74-60.64.124.1 | SUSE-SU-2019:2950-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.108.1 | SUSE-SU-2019:14218-1 |
| SLES 11 SP4 | ocfs2 | 1.6-0.28.11.2 | SUSE-SU-2019:14218-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.125.1 | SUSE-SU-2019:2984-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_33 | 1-3.5.1 | SUSE-SU-2019:2984-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.124.1 | SUSE-SU-2019:2950-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_37 | 1-2.3.1 | SUSE-SU-2019:2950-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.125.1 | SUSE-SU-2019:2984-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_33 | 1-3.5.1 | SUSE-SU-2019:2984-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
Advisories 11
- USN-4145-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- DSA-4497-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1885-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1884-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:14218-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2950-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2949-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2984-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-24-074-07 Siemens SIMATIC CISA ICS & IT advisories · Mar 14, 2024
- SSA-770721 SSA-770721: Multiple Vulnerabilities in SIMATIC RF160B before V2.2 Siemens ProductCERT · Mar 12, 2024
- WID-SEC-2023-0360 Google Android: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 10, 2023
References
- https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-inetcsklistenstop-gpf
- https://salsa.debian.org/kernel-team/linux/commit/baefcdc2f29923e7325ce4e1a72c3ff0a9800f32
- https://lists.openwall.net/netdev/2017/12/04/40
- https://github.com/torvalds/linux/commit/99253eb750fda6a644d5188fb26c43bad8d5a745
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=99253eb750fda6a644d5188fb26c43bad8d5a745
- DSA-4497 vendor-advisory
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1884-1] linux security update mailing-list
- 20190814 [slackware-security] Slackware 14.2 kernel (SSA:2019-226-01) mailing-list
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security update mailing-list
- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- https://support.f5.com/csp/article/K41582535
- USN-4145-1 vendor-advisory
- https://support.f5.com/csp/article/K41582535?utm_source=f5support&%3Butm_medium=RSS