CVE-2023-1076

2023-02-2718:30:24

redhat.com

access.redhat.com

linux kernel

tun/tap

local user

network filters

unauthorized access

mitigation

blacklist a kernel module

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

0.0004 Low

EPSS

Percentile

15.7%

JSON

A flaw was found in the Linux kernel’s TUN/TAP functionality. This issue could allow a local user to bypass network filters and get unauthorized access to some resources.

Mitigation

To mitigate this issue, prevent modules tap and tun from being loaded. Please see <https://access.redhat.com/solutions/41278> for how to blacklist a kernel module to prevent it from loading automatically.