CVE-2015-4170

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Summary

CVECVE-2015-4170
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-05-02 10:59:12 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionRace 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.

Risk And Classification

Primary CVSS: v3.0 4.7 MEDIUM from [email protected]

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

Problem Types: CWE-362 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary4.7MEDIUMCVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
2.0[email protected]Primary4.7AV:L/AC:M/Au:N/C:N/I:N/A:C

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:L/AC:M/Au:N/C:N/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All
Operating System Redhat Enterprise Linux Compute Node Eus 7.1 All All All
Operating System Redhat Enterprise Linux For Ibm Z Systems Eus 7.1_s390x All All All
Operating System Redhat Enterprise Linux For Power Big Endian Eus 7.1_ppc64 All All All
Operating System Redhat Enterprise Linux For Power Little Endian Eus 7.1_ppc64le All All All
Operating System Redhat Enterprise Linux Server Eus 7.1 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Vendor Advisory
Bug 1218879 – CVE-2015-4170 kernel: pty layer race condition on tty ldisc shutdown. af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, VDB Entry
tty: Fix hang at ldsem_down_read() · torvalds/linux@cf87277 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com
oss-security - CVE request: vulnerability in the kernel tty subsystem. af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Linux Kernel 'tty/tty_ldsem.c' Local Race Condition Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xz af854a3a-2127-422b-91ae-364da2661108 www.kernel.org Patch
Oracle Linux Bulletin - October 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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