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Fencer Intel
high 7.8

CVE-2018-14734 json

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 c…

published 2018-07-29 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6620

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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).

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.17.14-1

debian advisories DEBIAN-CVE-2018-14734

  • linux Ubuntu 14.04 LTS 3.13.0-164.214
  • linux Ubuntu 16.04 LTS 4.4.0-138.164
  • linux Ubuntu 18.04 LTS 4.15.0-43.46
  • linux-aws Ubuntu 14.04 LTS 4.4.0-1032.35
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1070.80
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1031.33
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1026.27~16.04.1
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1026.27

ubuntu advisories UBUNTU-CVE-2018-14734

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-alt RHEL 7 4.14.0-115.7.1.el7a
  • perf RHEL 7 4.14.0-115.7.1.el7a
  • kernel RHEL 7 4.14.0-115.7.1.el7a
  • python-perf RHEL 7 4.14.0-115.7.1.el7a
  • kernel-tools RHEL 7 4.14.0-115.7.1.el7a
  • kernel-tools-libs RHEL 7 4.14.0-115.7.1.el7a
  • kernel-bootwrapper RHEL 7 4.14.0-115.7.1.el7a
  • kernel-abi-whitelists RHEL 7 4.14.0-115.7.1.el7a

red hat advisories RHSA-2019:0831RHSA-2019:2029RHSA-2019:2043

  • kernel-syms SLES 12 SP2-BCL, OpenStack Cloud 7, Enterprise Storage 4 +2 more 4.4.121-92.92.1
  • kernel-source SLES 12 SP2-BCL, OpenStack Cloud 7, Enterprise Storage 4 +2 more 4.4.121-92.92.1
  • lttng-modules SLES 12 SP2-BCL, OpenStack Cloud 7, Enterprise Storage 4 +2 more 2.7.1-9.4.1
  • kernel-default SLES 12 SP2-BCL, SLE High Availability Extension 12 SP2, OpenStack Cloud 7 +3 more 4.4.121-92.92.1
  • kgraft-patch-SLE12-SP2_Update_24 SLES 12 SP2-BCL, OpenStack Cloud 7, Enterprise Storage 4 +2 more 1-3.7.1
  • kernel-rt SLE Real Time 11 SP4 3.0.101.rt130-69.36.1
  • kernel-syms-rt SLE Real Time 11 SP4 3.0.101.rt130-69.36.1
  • kernel-rt_trace SLE Real Time 11 SP4 3.0.101.rt130-69.36.1

suse advisories SUSE-SU-2019:1489-1SUSE-SU-2019:1437-1SUSE-SU-2019:1422-1SUSE-SU-2018:2344-2SUSE-SU-2018:3088-1SUSE-SU-2018:2907-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-14734 updated cvss 5.3

kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, kernel-tools-libs 3.10.0-1062.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, kernel-tools-libs 3.10.0-1062.el7, +2 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.el7
    fixed: vendor fix RHSA-2019:2029
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.7.1.el7a, kernel 4.14.0-115.7.1.el7a, kernel-alt 4.14.0-115.7.1.el7a, python-perf 4.14.0-115.7.1.el7a, kernel-tools 4.14.0-115.7.1.el7a, kernel-tools-libs 4.14.0-115.7.1.el7a, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.7.1.el7a
    fixed: vendor fix RHSA-2019:0831
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1062.rt56.1022.el7, kernel-rt-trace 3.10.0-1062.rt56.1022.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.rt56.1022.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1062.rt56.1022.el7, kernel-rt-kvm 3.10.0-1062.rt56.1022.el7, kernel-rt-trace 3.10.0-1062.rt56.1022.el7, kernel-rt-debug-kvm 3.10.0-1062.rt56.1022.el7, kernel-rt-trace-kvm 3.10.0-1062.rt56.1022.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.rt56.1022.el7
    fixed: vendor fix RHSA-2019:2043
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-kdump 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1062.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.el7 Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, kernel-tools-libs 3.10.0-1062.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.el7
    fixed: vendor fix RHSA-2019:2029
  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.1 AV:L/AC:L/Au:N/C:P/I:P/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.