UBUNTU-CVE-2014-4655

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UBUNTU-CVE-2014-4655

Summary:

Details: The snd_ctl_elem_add function in sound/core/control.c in the ALSA control implementation in the Linux kernel before 3.15.2 does not properly maintain the user_ctl_count value, which allows local users to cause a denial of service (integer overflow and limit bypass) by leveraging /dev/snd/controlCX access for a large number of SNDRV_CTL_IOCTL_ELEM_REPLACE ioctl calls.

References: https://ubuntu.com/security/CVE-2014-4655, https://github.com/torvalds/linux/commit/82262a46627bebb0febcc26664746c25cef08563, https://bugzilla.redhat.com/show_bug.cgi?id=1113445, http://www.openwall.com/lists/oss-security/2014/06/26/6, http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.2, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=82262a46627bebb0febcc26664746c25cef08563, https://ubuntu.com/security/notices/USN-2332-1, https://ubuntu.com/security/notices/USN-2333-1, https://ubuntu.com/security/notices/USN-2334-1, https://ubuntu.com/security/notices/USN-2335-1, https://ubuntu.com/security/notices/USN-2336-1, https://ubuntu.com/security/notices/USN-2337-1, https://www.cve.org/CVERecord?id=CVE-2014-4655