NULL pointer dereference in Linux kernel - CVE-2019-15221
Published: September 11, 2019
Vulnerability identifier: #VU21056
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2019-15221
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2019-15221
Install update from vendor's website.
Sources
- http://www.openwall.com/lists/oss-security/2019/08/20/2
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3450121997ce872eb7f1248417225827ea249710
- https://security.netapp.com/advisory/ntap-20190905-0002/
- https://syzkaller.appspot.com/bug?id=240f09164db2c3d3af33a117c713dc7650dc29d6
- https://usn.ubuntu.com/4115-1/
- https://usn.ubuntu.com/4118-1/