Medium severity · published May 2, 2016
CVE-2015-4170
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…
4.7
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
through 3.13.3 · source: NVD
EL
Enterprise Linux Compute Node Eus · Redhat
7.1 · source: NVD
EL
Enterprise Linux For Ibm Z Systems Eus · Redhat
7.1_s390x · source: NVD
EL
Enterprise Linux For Power Big Endian Eus · Redhat
7.1_ppc64 · source: NVD
EL
Enterprise Linux For Power Little Endian Eus · Redhat
7.1_ppc64le · source: NVD
EL
Enterprise Linux Server Eus · Redhat
7.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-4170
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-4170
Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203ae
www.openwall.com
http://www.openwall.com/lists/oss-security/2015/05/26/1
www.oracle.com
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
www.securityfocus.com
http://www.securityfocus.com/bid/74820
Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1395
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1218879
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