CVE-2021-39714

2022-03-1600:00:00

ubuntu.com

4.6 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

9.6%

JSON

In ion_buffer_kmap_get of ion.c, there is a possible use-after-free due to
an integer overflow. This could lead to local escalation of privilege with
no additional execution privileges needed. User interaction is not needed
for exploitation.Product: AndroidVersions: Android kernelAndroid ID:
A-205573273References: Upstream kernel

Notes

Author	Note
sbeattie	fixed by dropping the ion_map_kernel interface, claimed to be unused; however, android commit in references gives a fix

OSVersionArchitecturePackageVersionFilename
ubuntu16.04noarchlinux< 4.4.0-229.263UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1109.115UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1145.160UNKNOWN
ubuntu16.04noarchlinux-azure< 4.13.0-1005.7UNKNOWN
ubuntu16.04noarchlinux-gcp< 4.13.0-1002.5UNKNOWN
ubuntu16.04noarchlinux-hwe< 4.13.0-32.35~16.04.1UNKNOWN
ubuntu16.04noarchlinux-kvm< 4.4.0-1110.120UNKNOWN
ubuntu14.04noarchlinux-lts-xenial< 4.4.0-229.263~14.04.1UNKNOWN
ubuntu18.04noarchlinux-snapdragon< 4.15.0-1053.57UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	16.04	noarch	linux	< 4.4.0-229.263	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1109.115	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1145.160	UNKNOWN
ubuntu	16.04	noarch	linux-azure	< 4.13.0-1005.7	UNKNOWN
ubuntu	16.04	noarch	linux-gcp	< 4.13.0-1002.5	UNKNOWN
ubuntu	16.04	noarch	linux-hwe	< 4.13.0-32.35~16.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-kvm	< 4.4.0-1110.120	UNKNOWN
ubuntu	14.04	noarch	linux-lts-xenial	< 4.4.0-229.263~14.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-snapdragon	< 4.15.0-1053.57	UNKNOWN