NULL pointer dereference in Linux kernel - CVE-2019-15221

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Main Vulnerability Database Vulnerabilities #VU21056

NULL pointer dereference in Linux kernel - CVE-2019-15221

Published: September 11, 2019


Vulnerability identifier: #VU21056
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-15221
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

Linux kernel
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
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
linux-4.4.217/kernel-generic
linux-4.4.217/kernel-huge
linux-4.4.217/kernel-modules
linux-4.4.217/kernel-headers
kernel (Red Hat package)
kernel-rt (Red Hat package)
RSA Authentication Manager

How to mitigate CVE-2019-15221

Install update from vendor's website.

Linux kernel - update to 5.1.17
linux-4.4.217/kernel-generic - update to 4.4.217
linux-4.4.217/kernel-huge - update to 4.4.217
linux-4.4.217/kernel-modules - update to 4.4.217
linux-4.4.217/kernel-headers - update to 4.4.217_smp
kernel (Red Hat package) - update to 4.18.0-193.el8
kernel-rt (Red Hat package) - update to 4.18.0-193.rt13.51.el8
RSA Authentication Manager - update to 8.4 Patch 9

External References

Related Security Bulletins