CVE-2016-0821 Information

Description

The LIST_POISON feature in include/linux/poison.h in the Linux kernel before 4.3 as used in Android 6.0.1 before 2016-03-01 does not properly consider the relationship to the mmap_min_addr value which makes it easier for attackers to bypass a poison-pointer protection mechanism by triggering the use of an uninitialized list entry aka Android internal bug 26186802 a different vulnerability than CVE-2015-3636.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8a5e5e02fc83aaf67053ab53b359af08c6c49aaf http://source.android.com/security/bulletin/2016-03-01.html http://www.debian.org/security/2016/dsa-3607 http://www.openwall.com/lists/oss-security/2015/05/02/6 http://www.securityfocus.com/bid/84260 http://www.ubuntu.com/usn/USN-2967-1 http://www.ubuntu.com/usn/USN-2967-2 http://www.ubuntu.com/usn/USN-2968-1 http://www.ubuntu.com/usn/USN-2968-2 http://www.ubuntu.com/usn/USN-2969-1 http://www.ubuntu.com/usn/USN-2970-1 http://www.ubuntu.com/usn/USN-2971-1 http://www.ubuntu.com/usn/USN-2971-2 http://www.ubuntu.com/usn/USN-2971-3 https://github.com/torvalds/linux/commit/8a5e5e02fc83aaf67053ab53b359af08c6c49aaf

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5