{"cve":"CVE-2015-4170","nvd":{"published":"2016-05-02T10:59:12.623","modified":"2026-06-17T00:26:51.493","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H","score":4.7},"cwes":["CWE-362"],"references":["http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203ae","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://access.redhat.com/errata/RHSA-2016:1395"],"products":["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","redhat:enterprise_linux_server_eus"],"source":"nvd","synced_at":"2026-10-19T20:38:51.654415212+00:00"},"epss":{"cve":"CVE-2015-4170","score":0.00326,"percentile":0.25693,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}