NULL pointer dereference in Linux kernel

1) NULL pointer dereference

EUVDB-ID: #VU28401

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10207

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

A flaw was found in the Linux kernel's Bluetooth implementation of UART, all versions kernel 3.x.x before 4.18.0 and kernel 5.x.x. An attacker with local access and write permissions to the Bluetooth hardware could use this flaw to issue a specially crafted ioctl function call and cause the system to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.14 - 5.2.21

External links

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.136
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.6
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.