CVE-2015-4170

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    CVE-2015-4170

    Published: 2 May 2016Last Modified: 10 Apr 2026

    Summary:

    Details: 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.

    References: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203ae, https://access.redhat.com/errata/RHSA-2016:1395, https://bugzilla.redhat.com/show_bug.cgi?id=1218879, https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203ae, https://www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xz, https://bugzilla.redhat.com/show_bug.cgi?id=1218879, 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

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High