Ubuntu.comUB:CVE-2021-39800CVE-2021-39800
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
0.0004 Low
EPSS
Percentile
5.1%
In ion_ioctl of ion-ioctl.c, there is a possible way to leak kernel head
data due to a use after free. This could lead to local information
disclosure with no additional execution privileges needed. User interaction
is not needed for exploitation.Product: AndroidVersions: Android
kernelAndroid ID: A-208277166References: Upstream kernel
Notes
| Author | Note |
|---|---|
| sbeattie | CONFIG_ION is disabled in Ubuntu kernels (with the exception of linux-xilinx-zynqmp/focal), so are not affected by this. the ION memory manager was removed from the kernel in e722a295cf49 (“staging: ion: remove from the tree”) (v5.11-rc1) |
Related
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
0.0004 Low
EPSS
Percentile
5.1%