What is CVE-2015-4170?

CVE-2015-4170 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2015-4170 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2015-4170?

CVE-2015-4170 has a CVSS score of 4.7 out of 10, rated Medium severity. The vector string is CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2015-4170?

No patch is currently available for CVE-2015-4170. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2015-4170 actively exploited?

CVE-2015-4170 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2015-4170

Medium

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.

Package Linux Kernel

Published 2016-05-02

Last modified 2026-05-06

CVSS version 3.0

Patch available

Awaiting data

CVSS 3.0 score

4.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness type

CWE-362

CVE-2015-4170 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2015-4170 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Openwall
http://www.openwall.com/lists/oss-security/2015/05/26/1
Oracle
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
Securityfocus
http://www.securityfocus.com/bid/74820
Red Hat
https://access.redhat.com/errata/RHSA-2016:1395

Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1218879

Issue Tracking VDB Entry
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203ae
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203ae
Patch
Kernel patch commit
https://www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xz
Patch

Details

CVE ID CVE-2015-4170

Severity Medium

CVSS score 4.7 / 10

CVSS version 3.0

Published 2016-05-02

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2015-4170?

CVE-2015-4170 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2015-4170 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2015-4170?

CVE-2015-4170 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2015-4170?

No patch is currently available for CVE-2015-4170. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2015-4170 actively exploited?

No — CVE-2015-4170 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →