CVE-2015-4170: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Race condition in the ldsem_cmpxchg function in drivers/tty/tty_ldsem.c in the Linux kernel before 3.13-rc4-next-20131218 allows local users to cause a denial of service (ldsem_down_read and ldsem_down_write deadlock) by establishing a new tty thread during shutdown of a previous tty thread.

Affected products

• Linux Linux Kernel: up to and including 3.13.3
• Red Hat Enterprise Linux Compute Node Eus: version 7.1 only
• Red Hat Enterprise Linux For IBM Z Systems Eus: version 7.1_s390x only
• Red Hat Enterprise Linux For Power Big Endian Eus: version 7.1_ppc64 only
• Red Hat Enterprise Linux For Power Little Endian Eus: version 7.1_ppc64le only
• Red Hat Enterprise Linux Server Eus: version 7.1 only

Published 2016-05-02. Last modified 2026-06-17.