#VU23032 Memory leak in Linux kernel - CVE-2019-19063

Vulnerability identifier: #VU23032

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-19063

CWE-ID: CWE-401

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Linux Foundation

Description

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

The vulnerability exists due to memory leak within the "rtl_usb_probe()" function in "drivers/net/wireless/realtek/rtlwifi/usb.c" file. A remote attacker on the local network can cause a denial of service condition (memory consumption).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.3 - 5.3.11

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External links
https://github.com/torvalds/linux/commit/3f93616951138a598d930dcaec40f2bfd9ce43bb
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O3PSDE6PTOTVBK2YTKB2TFQP2SUBVSNF/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PY7LJMSPAGRIKABJPDKQDTXYW3L5RX2T/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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