Skip to content
Fencer Intel
high 7.8

CVE-2018-9422 json

In get_futex_key of futex.c, there is a use-after-free due to improper locking.

published 2018-11-06 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-21016

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

In get_futex_key of futex.c, there is a use-after-free due to improper locking. This could lead to local escalation of privilege with no additional privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-74250718 References: Upstream kernel.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.6.1-1

debian advisories DEBIAN-CVE-2018-9422

  • linux Ubuntu 16.04 LTS 4.4.0-127.153
  • linux-aws Ubuntu 14.04 LTS 4.4.0-1022.22
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1060.69
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1026.31
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1090.98
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-127.153~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1093.98
  • linux-snapdragon Ubuntu 18.04 LTS 4.15.0-1053.57

ubuntu advisories UBUNTU-CVE-2018-9422

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

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-2018-9422 updated cvss 2.5

kernel: Elevation of Privilege in futex

  • 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 Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    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

0.22% chance of exploitation in the next 30 days, higher than 12% 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 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Google Inc. Android

Classification

Weakness

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.