Home/CVE/Race condition in the ldsem_cmpxchg function in drivers/tty/tty_ldsem.c in the Linux kernel before 3.13-rc4-next-2013121
CVE

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-2013121

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.

MEDIUM · CVSS 4.7 EPSS 0.00064
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
▤

Affected Products & Versions

6
linux kernel<= 3.13.3
redhat enterprise linux compute node eusall versions
redhat enterprise linux for ibm z systems eusall versions
redhat enterprise linux for power big endian eusall versions
redhat enterprise linux for power little endian eusall versions
redhat enterprise linux server eusall versions
▣

Scoring & Timeline

4.7
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 May 2016 · 10:59 AM
CVSS VectorCVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

3
rhsaRHSA-2015:2152Moderate
rhsaRHSA-2015:2411Low
rhsaRHSA-2016:1395Moderate
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203aeVendor Advisory
http://www.openwall.com/lists/oss-security/2015/05/26/1
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securityfocus.com/bid/74820
https://bugzilla.redhat.com/show_bug.cgi?id=1218879Issue TrackingVDB Entry
https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203ae
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