CVE-2015-4170

low-risk
Published 2016-05-02

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.

Do I need to act?

-
0.06% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
LOCAL / HIGH complexity

Affected Products (6)

Enterprise Linux Compute Node Eus

Affected Vendors

Redhat Linux

References (16)

Vendor Advisory http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf8727...
http://www.openwall.com/lists/oss-security/2015/05/26/1
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.h...
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
https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203a...
Patch https://www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xz
Vendor Advisory http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf8727...
http://www.openwall.com/lists/oss-security/2015/05/26/1
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.h...
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
https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203a...
Patch https://www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xz
25
/ 100
low-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 13/34 · Low