Ubuntu.comUB:CVE-2021-39714CVE-2021-39714
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
4.6 Medium
CVSS2
Access Vector
LOCAL
Access 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
0.0004 Low
EPSS
Percentile
8.8%
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 |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 16.04 | noarch | linux | < 4.4.0-229.263) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1109.115) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1145.160) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-azure | < 4.13.0-1005.7) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-gcp | < 4.13.0-1002.5) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-hwe | < 4.13.0-32.35~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-kvm | < 4.4.0-1110.120) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-lts-xenial | < 4.4.0-229.263~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-snapdragon | < 4.15.0-1053.57 | UNKNOWN |
References
android.googlesource.com/kernel/common/+/16b34e53eaadd%5E%21/#F0
launchpad.net/bugs/cve/CVE-2021-39714
nvd.nist.gov/vuln/detail/CVE-2021-39714
security-tracker.debian.org/tracker/CVE-2021-39714
source.android.com/security/bulletin/pixel/2022-03-01
ubuntu.com/security/notices/USN-5505-1
ubuntu.com/security/notices/USN-5513-1
www.cve.org/CVERecord?id=CVE-2021-39714
Related
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
4.6 Medium
CVSS2
Access Vector
LOCAL
Access 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
0.0004 Low
EPSS
Percentile
8.8%