CVE-2023-47233

2023-11-0702:32:36

redhat.com

access.redhat.com

use-after-free

brcm80211

linux kernel

physical attacker

device disconnect

mitigation

blacklist

kernel module

4.3 Medium

CVSS3

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4.1 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

A use-after-free issue was found in the brcm80211 component in the Linux kernel, which may be triggered by a physical attacker while disconnecting a device.

Mitigation

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