What is CVE-2018-14734?

CVE-2018-14734 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2018-07-29.

How severe is CVE-2018-14734?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2018-14734 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Linux Kernel

CVE-2018-14734

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).

Vulnerability class: Use-After-Free

Published 2018-07-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.0th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
Debian Linux — versions 8.0, 9.0

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
usn.ubuntu.com/3797-2/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3847-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3797-1/ (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/10/msg00003.html (mailing-list, Mailing List, Third Party Advisory)
usn.ubuntu.com/3847-2/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3849-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3849-2/ (vendor-advisory, Third Party Advisory)
www.debian.org/security/2018/dsa-4308 (vendor-advisory, Third Party Advisory)
github.com/torvalds/linux/commit/cb2595c1393b4a5211534e6f0a0fbad369e21ad8 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-14734?: CVE-2018-14734 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2018-07-29.
How severe is CVE-2018-14734?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2018-14734 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.