Description
The SCTP socket buffer used by a userspace application is not accounted by the cgroups subsystem. An attacker can use this flaw to cause a denial of service attack. Kernel 3.10.x and 4.18.x branches are believed to be vulnerable.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Linux Foundation | kernel | 3.10.x and 4.18.x | — |
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 | 5.2.6-1 | — |
| Debian 13 | linux | 5.2.6-1 | — |
| Debian 12 | linux | 5.2.6-1 | — |
| Debian 9 | linux-4.19 | 4.19.146-1~deb9u1 | DLA-2385-1 |
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 18.04 LTS | linux | 4.15.0-50.54 | USN-3981-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1039.41 | USN-3981-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.18.0-1018.18~18.04.1 | USN-3980-2 |
| Ubuntu 18.04 LTS | linux-gcp +1 | 4.15.0-1032.34 | USN-3981-1 |
| Ubuntu 18.04 LTS | linux-gcp-edge | 4.18.0-1011.12~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe | 4.18.0-20.21~18.04.1 | USN-3980-2 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1034.34 | USN-3981-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1038.43 | USN-3981-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1013.15 | USN-3981-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1036.38 | USN-3981-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1053.57 | USN-3981-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-148.174 | USN-3982-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1083.93 | USN-3982-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1039.41~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1045.49 | USN-3981-2 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1032.34~16.04.1 | USN-3981-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-50.54~16.04.1 | USN-3981-2 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1046.52 | USN-3982-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1013.15~16.04.1 | USN-3981-2 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1109.117 | USN-3982-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1113.118 | USN-3982-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1044.47 | — |
| Ubuntu 14.04 LTS | linux-azure | 4.15.0-1045.49~14.04.1 | USN-3981-2 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-148.174~14.04.1 | USN-3982-2 |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1010.13 | — |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-147.rt24.93.el8 | RHSA-2019:3309 |
| RHEL 8 | perf +26 | 4.18.0-147.el8 | RHSA-2019:3517 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-docs +4 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES 15 | kernel-syms +4 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES 12 SP5 | kernel-azure | 4.12.14-16.73.2 | SUSE-SU-2021:3192-1 |
| SLES 12 SP5 | kernel-docs +3 | 4.12.14-122.88.1 | SUSE-SU-2021:3206-1 |
| SLES 12 SP5 | kernel-obs-build | 4.12.14-122.88.2 | SUSE-SU-2021:3206-1 |
| SLES 12 SP5 | kernel-syms-azure +1 | 4.12.14-16.73.1 | SUSE-SU-2021:3192-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.182.1 | SUSE-SU-2022:4611-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.196.2 | SUSE-SU-2022:4561-1 |
| SLES for SAP 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES for SAP 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES for SAP 12 SP5 | kernel-azure | 4.12.14-16.73.2 | SUSE-SU-2021:3192-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.88.1 | SUSE-SU-2021:3206-1 |
| SLES for SAP 12 SP5 | kernel-syms-azure +1 | 4.12.14-16.73.1 | SUSE-SU-2021:3192-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLE Real Time 12 SP5 | kernel-rt +1 | 4.12.14-10.57.2 | SUSE-SU-2021:3217-1 |
| SLE Real Time 12 SP5 | kernel-syms-rt +1 | 4.12.14-10.57.1 | SUSE-SU-2021:3217-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_27 | 1-3.3.1 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_26 | 1-1.3.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.88.1 | SUSE-SU-2021:3206-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_23 | 1-8.5.1 | SUSE-SU-2021:3206-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_23 | 1-6.3.1 | SUSE-SU-2021:3972-1 |
| SLE HPC 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLE HPC 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE Enterprise Storage 6 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SUSE Enterprise Storage 6 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | kernel-debug +4 | 4.12.14-197.102.2 | openSUSE-SU-2021:3876-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-147.el8 | ELSA-2019-3517 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.43.4.el7uek | ELSA-2020-5885, ELSA-2020-5866, ELSA-2020-5845 |
| Oracle Linux 7 | perf +5 | 4.14.35-1902.306.2.el7uek | ELSA-2020-5885, ELSA-2020-5845, ELSA-2020-5844 |
Advisories 23
- RHSA-2019:3517 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2019:3309 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-3981-2 linux-hwe, linux-azure, linux-gcp, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Jun 1, 2026
- USN-3982-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 1, 2026
- USN-3982-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Jun 1, 2026
- USN-3981-1 linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 1, 2026
- USN-3980-2 linux-hwe, linux-azure vulnerabilities Ubuntu Security Notices (USN) · Jun 1, 2026
- DLA-2385-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3217-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3969-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4561-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4611-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3972-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3192-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3206-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-2367 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Dec 26, 2022
- ELSA-2020-5885 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 12, 2020
- ELSA-2020-5866 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
- ELSA-2020-5844 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2020
- ELSA-2020-5845 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2020
- ELSA-2019-3517 Important: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 14, 2019
References
- USN-3981-1 vendor-advisory
- USN-3980-1 vendor-advisory
- USN-3979-1 vendor-advisory
- USN-3982-2 vendor-advisory
- USN-3982-1 vendor-advisory
- USN-3980-2 vendor-advisory
- USN-3981-2 vendor-advisory
- RHSA-2019:3309 vendor-advisory
- RHSA-2019:3517 vendor-advisory
- [debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update mailing-list
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3874
- https://security.netapp.com/advisory/ntap-20190411-0003/