SB2019080834 - Improper locking in Linux kernel
Published: August 8, 2019 Updated: September 3, 2019
Security Bulletin ID
SB2019080834
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2019-14763)
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.
Remediation
Install update from vendor's website.
References
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.4
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=072684e8c58d17e853f8e8b9f6d9ce2e58d2b036
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c91815b596245fd7da349ecc43c8def670d2269e
- https://github.com/torvalds/linux/commit/072684e8c58d17e853f8e8b9f6d9ce2e58d2b036
- https://github.com/torvalds/linux/commit/c91815b596245fd7da349ecc43c8def670d2269e