Ubuntu.comUB:CVE-2021-34866CVE-2021-34866
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
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.001 Low
EPSS
Percentile
20.6%
This vulnerability allows local attackers to escalate privileges on
affected installations of Linux Kernel 5.14-rc3. An attacker must first
obtain the ability to execute low-privileged code on the target system in
order to exploit this vulnerability. The specific flaw exists within the
handling of eBPF programs. The issue results from the lack of proper
validation of user-supplied eBPF programs, which can result in a type
confusion condition. An attacker can leverage this vulnerability to
escalate privileges and execute arbitrary code in the context of the
kernel. Was ZDI-CAN-14689.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 21.04 | noarch | linux | <Â 5.11.0-38.42 | UNKNOWN |
| ubuntu | 21.04 | noarch | linux-aws | <Â 5.11.0-1020.21 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws-5.11 | <Â 5.11.0-1020.21~20.04.2 | UNKNOWN |
| ubuntu | 21.04 | noarch | linux-azure | <Â 5.11.0-1020.21 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure-5.11 | <Â 5.11.0-1020.21~20.04.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-azure-fde | <Â any | UNKNOWN |
| ubuntu | 21.04 | noarch | linux-gcp | <Â 5.11.0-1021.23 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gcp-5.11 | <Â 5.11.0-1021.23~20.04.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-gkeop | <Â any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-hwe-5.11 | <Â 5.11.0-38.42~20.04.1 | UNKNOWN |
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
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.001 Low
EPSS
Percentile
20.6%