NULL pointer dereference in Linux kernel

1) NULL pointer dereference

EUVDB-ID: #VU21056

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15221

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in sound/usb/line6/pcm.c driver. A local user can perform a denial of service (DoS) attack using a malicious USB device.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.1.1 - 5.1.16

External links

http://www.openwall.com/lists/oss-security/2019/08/20/2
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3450121997ce872eb7f1248417225827ea249710
http://security.netapp.com/advisory/ntap-20190905-0002/
http://syzkaller.appspot.com/bug?id=240f09164db2c3d3af33a117c713dc7650dc29d6
http://usn.ubuntu.com/4115-1/
http://usn.ubuntu.com/4118-1/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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