CVE-2016-0821

MEDIUM

Linux kernel <4.3 - Use After Free

Title source: llm

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.

References (15)

[Issue Tracking, Patch, Vendor Advisory] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8a5e5e02fc83aaf67053ab53b359af08c6c49aaf

[Third Party Advisory] http://source.android.com/security/bulletin/2016-03-01.html

[Third Party Advisory] http://www.debian.org/security/2016/dsa-3607

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2015/05/02/6

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/84260

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2967-1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2967-2

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2968-1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2968-2

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2969-1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2970-1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2971-1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2971-2

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2971-3

[Issue Tracking, Patch, Third Party Advisory] https://github.com/torvalds/linux/commit/8a5e5e02fc83aaf67053ab53b359af08c6c49aaf

Scores

CVSS v3 5.5

EPSS 0.0001

EPSS Percentile 1.1%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Classification

CWE

CWE-908

Status draft

Affected Products (2)

linux/linux_kernel < 4.3

google/android

Timeline

Published Mar 12, 2016

Tracked Since Feb 18, 2026