CVE-2015-4170
kernel: pty layer race condition on tty ldisc shutdown.
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · January 19, 2015
Updated · June 28, 2026
Description
A flaw was discovered in the way the Linux kernel's TTY subsystem handled the tty shutdown phase. A local, unprivileged user could use this flaw to cause denial of service on the system by holding a reference to the ldisc lock during tty shutdown, causing a deadlock.
Statement
This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 5, 6.
This issue affects the Linux kernel packages kernel as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4.7AV:L/AC:M/Au:N/C:N/I:N/A:C
CWE-667 · Improper Locking