Use-after-free in Linux kernel - CVE-2019-12819

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Main Vulnerability Database Vulnerabilities #VU90815

Use-after-free in Linux kernel - CVE-2019-12819

Published: June 14, 2019 / Updated: June 18, 2019


Vulnerability identifier: #VU90815
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12819
CWE-ID: CWE-416
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 use-after-free error within the __mdiobus_register() function in drivers/net/phy/mdio_bus.c. A local user can perform a denial of service (DoS) attack.


Affected software

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

How to mitigate CVE-2019-12819

Install update from vendor's website.

linux-kvm (Ubuntu package) - update to 4.15.0-1042.42
linux-snapdragon (Ubuntu package) - update to 4.15.0-1060.66
linux-hwe (Ubuntu package) - update to 4.15.0-58.64~16.04.1
linux-gcp (Ubuntu package) - addressed in versions 4.15.0-1040.42~16.04.1, 4.15.0-1040.42
linux-azure (Ubuntu package) - update to 4.15.0-1055.60
linux (Ubuntu package) - update to 4.15.0-58.64
linux-raspi2 (Ubuntu package) - update to 4.15.0-1043.46
linux-oem (Ubuntu package) - update to 4.15.0-1050.57
linux-oracle (Ubuntu package) - addressed in versions 4.15.0-1021.23~16.04.1, 4.15.0-1021.23
linux-gke-4.15 (Ubuntu package) - update to 4.15.0-1040.42

External References

Related Security Bulletins