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
0.0004 Low
EPSS
Percentile
5.3%
In several functions of binder.c, there is a possible way to represent the
wrong domain to SELinux due to a race condition. 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-200688826References: Upstream kernel
Author | Note |
---|---|
sbeattie | AppArmor is the default MAC LSM for Ubuntu, not SELinux, though it is possible to boot with SELinux enforcement in place. |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < 5.4.0-100.113 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1066.69 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < 5.4.0-1066.69~18.04.1 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1070.73 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-4.15 | < any | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-5.4 | < 5.4.0-1070.73~18.04.1 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure-fde | < 5.4.0-1070.73 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure-fde | < any | UNKNOWN |
android.googlesource.com/kernel/common/+/11db2de0af2a
android.googlesource.com/kernel/common/+/3af7a2f61023
android.googlesource.com/kernel/common/+/a4eacf3227bd
android.googlesource.com/kernel/common/+/d49297739550
launchpad.net/bugs/cve/CVE-2021-39686
nvd.nist.gov/vuln/detail/CVE-2021-39686
security-tracker.debian.org/tracker/CVE-2021-39686
source.android.com/security/bulletin/2022-03-01
www.cve.org/CVERecord?id=CVE-2021-39686
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
0.0004 Low
EPSS
Percentile
5.3%