Vulnerability identifier: #VU24439

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19526

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to use-after-free error in the drivers/nfc/pn533/usb.c driver. A local user with physical access can use a malicious USB device to trigger use-after-free error and execute arbitrary code on the system with elevated privileges.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.3 - 5.3.8

---

External links
http://www.openwall.com/lists/oss-security/2019/12/03/4
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6af3aa57a0984e061f61308fe181a9a12359fecc
http://usn.ubuntu.com/4226-1/

---

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.