CVE-2015-4170

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.

Category

4.7
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.06%
Vendor Advisory redhat.com Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1218879 vdb entry issue tracking
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203ae vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203ae
http://www.openwall.com/lists/oss-security/2015/05/26/1 mailing list
https://www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xz patch
https://access.redhat.com/errata/RHSA-2016:1395 third party advisory vendor advisory
http://www.securityfocus.com/bid/74820 vdb entry

Frequently Asked Questions

What is the severity of CVE-2015-4170?
CVE-2015-4170 has been scored as a medium severity vulnerability.
How to fix CVE-2015-4170?
To fix CVE-2015-4170, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-4170 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-4170 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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