CVE-2018-1068

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-16 · updated 2026-06-17
Weakness: CWE-119

Description

A flaw was found in the Linux 4.x kernel's implementation of 32-bit syscall interface for bridging. This allowed a privileged user to arbitrarily write to a limited range of kernel memory.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 17.10
Debian Linux: 7.0, 8.0, 9.0
Linux kernel: before 3.2.102; from 3.3 before 3.16.57; from 3.17 before 3.18.100; from 3.19 before 4.1.51; from 4.2 before 4.4.122; from 4.5 before 4.9.88 — fixed in 3.16.57, 3.18.100, 3.2.102, 4.1.51, 4.14.27, 4.15.10
RedHat Enterprise Linux Desktop: 7.0
RedHat Enterprise Linux Server: 7.0
RedHat Enterprise Linux Server Aus: 7.6
RedHat Enterprise Linux Server Eus: 7.5, 7.6
RedHat Enterprise Linux Server Tus: 7.6
RedHat Enterprise Linux Workstation: 7.0
RedHat Virtualization Host: 4.0

How to fix

Upgrade to a fixed version: Linux kernel 3.16.57, 3.18.100, 3.2.102, 4.1.51. Check the vendor advisory for mitigations.

References

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