Infinite loop in Linux kernel - CVE-2017-18208

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Main Vulnerability Database Vulnerabilities #VU11181

Infinite loop in Linux kernel - CVE-2017-18208

Published: March 20, 2018 / Updated: March 20, 2018


Vulnerability identifier: #VU11181
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-18208
CWE-ID: CWE-835
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the madvise_willneed function due to infinite loop. A local attacker can trigger use of MADVISE_WILLNEED for a DAX mapping and cause the service to crash.

Affected software

Linux kernel
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
SUSE Linux
Ubuntu

kernel (Red Hat package)
kernel-rt (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-kvm (Ubuntu package)
linux-snapdragon (Ubuntu package)
kernel-alt (Red Hat package)
MRG Realtime

How to mitigate CVE-2017-18208

Update to version 4.14.4.

kernel (Red Hat package) - addressed in versions 3.10.0-693.61.1.el7, 3.10.0-862.44.2.el7
kernel-rt (Red Hat package) - update to 3.10.0-693.61.1.rt56.656.el6rt
linux (Ubuntu package) - addressed in versions 3.13.0-149.199, 4.4.0-119.143, 4.13.0-43.48
linux-aws (Ubuntu package) - update to 4.4.0-1054.63
linux-kvm (Ubuntu package) - update to 4.4.0-1020.25
linux-snapdragon (Ubuntu package) - update to 4.4.0-1088.93
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a

External References

Related Security Bulletins