CVE-2012-2136

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    CVE-2012-2136

    Published: 9 Aug 2012Last Modified: 10 Apr 2026

    Summary:

    Details: The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.

    References: http://rhn.redhat.com/errata/RHSA-2012-0743.html, http://rhn.redhat.com/errata/RHSA-2012-1087.html, http://secunia.com/advisories/50807, http://ubuntu.com/usn/usn-1529-1, http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5, http://www.securityfocus.com/bid/53721, http://www.ubuntu.com/usn/USN-1535-1, https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc, https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc, https://bugzilla.redhat.com/show_bug.cgi?id=816289, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc

    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