Memory leak in Linux kernel - CVE-2019-19063

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Main Vulnerability Database Vulnerabilities #VU23032

Memory leak in Linux kernel - CVE-2019-19063

Published: November 27, 2019 / Updated: December 5, 2019


Vulnerability identifier: #VU23032
CSH Severity: Medium
CVSS v4: 7.1 [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]
CVE-ID: CVE-2019-19063
CWE-ID: CWE-401
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

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).

Affected software

Linux kernel
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Slackware Linux
Fedora
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel
RSA Authentication Manager

How to mitigate CVE-2019-19063

Install updates from vendor's website.

Linux kernel - update to 5.3.12
kernel (Red Hat package) - addressed in versions 3.10.0-1160.el7, 4.18.0-240.el8
kernel-rt (Red Hat package) - update to 3.10.0-1160.rt56.1131.el7
kernel - addressed in versions 5.3.12-200.fc30, 5.3.12-300.fc31
RSA Authentication Manager - update to 8.5 Patch 3

External References

Related Security Bulletins