CVE-2016-4558

2016-05-2300:00:00

ubuntu.com

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

25.3%

JSON

The BPF subsystem in the Linux kernel before 4.5.5 mishandles reference
counts, which allows local users to cause a denial of service
(use-after-free) or possibly have unspecified other impact via a crafted
application on (1) a system with more than 32 Gb of memory, related to the
program reference count or (2) a 1 Tb system, related to the map reference
count.

Bugs

<https://launchpad.net/bugs/1579140>

Notes

Author	Note
jdstrand	android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support
sbeattie	made exploitable by unpriv bpf

OSVersionArchitecturePackageVersionFilename
ubuntu16.04noarchlinux< 4.4.0-24.43UNKNOWN
ubuntu14.04noarchlinux-lts-xenial< 4.4.0-24.43~14.04.1UNKNOWN
ubuntu16.04noarchlinux-raspi2< 4.4.0-1012.16UNKNOWN
ubuntu16.04noarchlinux-snapdragon< 4.4.0-1015.18UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	16.04	noarch	linux	< 4.4.0-24.43	UNKNOWN
ubuntu	14.04	noarch	linux-lts-xenial	< 4.4.0-24.43~14.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-raspi2	< 4.4.0-1012.16	UNKNOWN
ubuntu	16.04	noarch	linux-snapdragon	< 4.4.0-1015.18	UNKNOWN