#VU14592 Use-after-free error in Linux kernel - CVE-2018-14619
Published: August 31, 2018 / Updated: September 3, 2018
Vulnerability identifier: #VU14592
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-14619
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists in the crypto subsystem of the Linux Kerneldue to incorrect reference to the null skcipher held by each transformation object (TFM), improperly placed when each af_alg_ctx is freed from an affected device. A local attacker can use a custom program, cause the null skcipher to be freed while it is still in use and gain elevated privileges on an affected device.
Remediation
Update to version 4.15-rc4.