Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.13.3 |
| Redhat | Enterprise Linux Compute Node Eus | 7.1 |
| Redhat | Enterprise Linux For Ibm Z Systems Eus | 7.1_s390x |
| Redhat | Enterprise Linux For Power Big Endian Eus | 7.1_ppc64 |
| Redhat | Enterprise Linux For Power Little Endian Eus | 7.1_ppc64le |
| Redhat | Enterprise Linux Server Eus | 7.1 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf8727Vendor Advisory
- 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
- https://access.redhat.com/errata/RHSA-2016:1395Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1218879Issue TrackingVDB Entry
- https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203a
- https://www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xzPatch
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf8727Vendor Advisory
- 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
- https://access.redhat.com/errata/RHSA-2016:1395Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1218879Issue TrackingVDB Entry
- https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203a
FAQ
What is CVE-2015-4170?
CVE-2015-4170 is a vulnerability with a CVSS score of 4.7 (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_dow...
How severe is CVE-2015-4170?
CVE-2015-4170 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-4170?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux Compute Node Eus, Redhat Enterprise Linux For Ibm Z Systems Eus, Redhat Enterprise Linux For Power Big Endian Eus, Redhat Enterprise Linux For Power Little Endian Eus.