Description
drivers/infiniband/core/ucma.c in the Linux kernel through 4.17.11 allows ucma_leave_multicast to access a certain data structure after a cleanup step in ucma_process_join, which allows attackers to cause a denial of service (use-after-free).
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 | 4.17.14-1 | — |
| Debian 13 | linux | 4.17.14-1 | — |
| Debian 12 | linux | 4.17.14-1 | — |
| Debian 9 | linux | 4.9.110-3+deb9u5 | DSA-4308-1 |
| Debian 8 | linux | 3.16.59-1 | DLA-1529-1 |
| Debian 8 | linux-4.9 | 4.9.110-3+deb9u5~deb8u1 | DLA-1531-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | 4.15.0-43.46 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1031.33 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.15.0-1036.38 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-gcp | 4.15.0-1026.27 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1028.28 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1030.35 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1030.32 | USN-3847-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-138.164 | USN-3797-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1070.80 | USN-3797-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1031.33~16.04.1 | USN-3847-2 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1036.38~16.04.1 | USN-3847-2 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1026.27~16.04.1 | USN-3847-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-43.46~16.04.1 | USN-3847-2 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1036.42 | USN-3797-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1099.107 | USN-3797-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1103.108 | USN-3797-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-164.214 | USN-3849-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1032.35 | USN-3797-2 |
| Ubuntu 14.04 LTS | linux-azure | 4.15.0-1036.38~14.04.2 | USN-3847-3 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-138.164~14.04.1 | USN-3797-2 |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-alt +1 | 4.14.0-115.7.1.el7a | RHSA-2019:0831 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1062.rt56.1022.el7 | RHSA-2019:2043 |
| RHEL 7 | perf +18 | 3.10.0-1062.el7 | RHSA-2019:2029, RHSA-2019:0831 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | dpdk +1 | 16.11.6-8.7.2 | SUSE-SU-2018:2328-1 |
| SLES 12 SP3 | kernel-azure +2 | 4.4.143-4.13.1 | SUSE-SU-2018:2374-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.143-94.47.1 | SUSE-SU-2018:2328-1 |
| SLES 12 SP3 | lttng-modules | 2.7.1-8.4.2 | SUSE-SU-2018:2328-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-2, SUSE-SU-2018:2344-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_23 | 8-2.1 | SUSE-SU-2019:1422-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-2, SUSE-SU-2018:2344-1 |
| SLES 12 SP2 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-2, SUSE-SU-2018:2344-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.99.1 | SUSE-SU-2018:2384-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_29 | 10-2.1 | SUSE-SU-2019:1422-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_30 | 1-2.3.1 | SUSE-SU-2018:2384-1 |
| SLES 12 SP1 | lttng-modules | 2.7.0-4.2.1 | SUSE-SU-2018:2384-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.141.1 | SUSE-SU-2018:2384-1, SUSE-SU-2018:2362-1 |
| SLES 12 | kgraft-patch-SLE12_Update_36 | 10-2.1 | SUSE-SU-2019:1422-1 |
| SLES 12 | kgraft-patch-SLE12_Update_37 | 1-1.5.1 | SUSE-SU-2018:2362-1 |
| SLES 12 | lttng-modules | 2.4.1-16.6.1 | SUSE-SU-2018:2362-1 |
| SLES 11 SP4 | kernel-ec2 +9 | 3.0.101-108.71.1 | SUSE-SU-2018:2879-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.50.1 | SUSE-SU-2018:2907-1 |
| SLES for SAP 12 SP3 | dpdk +1 | 16.11.6-8.7.2 | SUSE-SU-2018:2328-1 |
| SLES for SAP 12 SP3 | kernel-azure +1 | 4.4.143-4.13.1 | SUSE-SU-2018:2374-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.143-94.47.1 | SUSE-SU-2018:2328-1 |
| SLES for SAP 12 SP3 | lttng-modules | 2.7.1-8.4.2 | SUSE-SU-2018:2328-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_23 | 8-2.1 | SUSE-SU-2019:1422-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-1 |
| SLES for SAP 12 SP2 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.99.1 | SUSE-SU-2018:2384-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_29 | 10-2.1 | SUSE-SU-2019:1422-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_30 | 1-2.3.1 | SUSE-SU-2018:2384-1 |
| SLES for SAP 12 SP1 | lttng-modules | 2.7.0-4.2.1 | SUSE-SU-2018:2384-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.71.1 | SUSE-SU-2018:2879-1 |
| SLE Real Time 12 SP3 | kernel-rt +3 | 4.4.147-3.20.1 | SUSE-SU-2018:2596-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.36.1 | SUSE-SU-2018:3088-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_0 | 10-28.1 | SUSE-SU-2019:1489-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_1 | 9-2.1 | SUSE-SU-2019:1437-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_13 | 10-2.1 | SUSE-SU-2019:1422-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_14 +1 | 8-2.1 | SUSE-SU-2019:1422-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_16 | 1-4.5.1 | SUSE-SU-2018:2328-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-1 |
| SUSE OpenStack Cloud 7 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.50.1 | SUSE-SU-2018:2907-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-1 |
| SUSE Enterprise Storage 4 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.20.7.el7uek | ELSA-2018-4270, ELSA-2018-4261 |
| Oracle Linux 7 | kernel-uek-tools +3 | 4.14.35-1818.4.5.el7uek | ELSA-2018-4270 |
| Oracle Linux 7 | perf +12 | 3.10.0-1062.el7 | ELSA-2019-2029, ELSA-2018-4270 |
Advisories 28
- RHSA-2019:2043 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:2029 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:0831 Red Hat Security Advisory: kernel-alt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3849-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3847-1 linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3797-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4308-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1529-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1531-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3847-3 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3847-2 linux-hwe, linux-aws-hwe, linux-azure, linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3797-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:2328-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2374-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2907-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1437-1 Security update for the Linux Kernel (Live Patch 1 for SLE 15) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1422-1 Security update for the Linux Kernel (Live Patch 23 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2344-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3088-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2362-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2879-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2384-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1489-1 Security update for the Linux Kernel (Live Patch 0 for SLE 15) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2344-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2596-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-2029 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
- ELSA-2018-4270 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 8, 2018
- ELSA-2018-4261 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 24, 2018
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cb2595c1393b4a5211534e6f0a0fbad369e21ad8
- USN-3797-2 vendor-advisory
- USN-3847-1 vendor-advisory
- USN-3797-1 vendor-advisory
- [debian-lts-announce] 20181003 [SECURITY] [DLA 1531-1] linux-4.9 security update mailing-list
- USN-3847-2 vendor-advisory
- USN-3849-1 vendor-advisory
- USN-3849-2 vendor-advisory
- DSA-4308 vendor-advisory
- https://github.com/torvalds/linux/commit/cb2595c1393b4a5211534e6f0a0fbad369e21ad8
- USN-3847-3 vendor-advisory
- RHSA-2019:0831 vendor-advisory
- RHSA-2019:2043 vendor-advisory
- RHSA-2019:2029 vendor-advisory