#VU20918 NULL pointer dereference in Linux kernel - CVE-2019-15291

Vulnerability identifier: #VU20918

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-15291

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

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

The vulnerability exists due to a NULL pointer dereference error in the "flexcop_usb_probe" function in the "drivers/media/usb/b2c2/flexcop-usb.c" driver. A local attacker with physical access can use a malicious USB device and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.2 - 5.2.9

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External links
https://www.openwall.com/lists/oss-security/2019/08/20/2
https://www.openwall.com/lists/oss-security/2019/08/22/1
https://syzkaller.appspot.com/bug?id=c0203bd72037d07493f4b7562411e4f5f4553a8f

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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.