Improper locking in Linux kernel - CVE-2019-14763

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Main Vulnerability Database Vulnerabilities #VU20807

Improper locking in Linux kernel - CVE-2019-14763

Published: September 3, 2019


Vulnerability identifier: #VU20807
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-2019-14763
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service attack (DoS) on the target system.

The vulnerability exists due to double-locking error in the DesignWare USB3 DRD Controller device in "drivers/usb/dwc3/gadget.c". An authenticated local user with physical access to the system can exploit this vulnerability to cause a deadlock with "f_hid", resulting in a denial of service condition.


Affected software

Linux kernel
Ubuntu
linux-kvm (Ubuntu package)
linux-hwe (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux (Ubuntu package)
linux-raspi2 (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gke-4.15 (Ubuntu package)

How to mitigate CVE-2019-14763

Install updates from vendor's website.

Linux kernel - update to 4.16.4
linux-kvm (Ubuntu package) - update to 4.15.0-1043.43
linux-hwe (Ubuntu package) - update to 4.15.0-60.67~16.04.1
linux-gcp (Ubuntu package) - update to 4.15.0-1041.43
linux-azure (Ubuntu package) - update to 4.15.0-1056.61
linux (Ubuntu package) - update to 4.15.0-60.67
linux-raspi2 (Ubuntu package) - update to 4.15.0-1044.47
linux-oracle (Ubuntu package) - addressed in versions 4.15.0-1022.25~16.04.1, 4.15.0-1022.25
linux-gke-4.15 (Ubuntu package) - update to 4.15.0-1041.43

External References

Related Security Bulletins