Use-after-free in Linux kernel - CVE-2018-6555
Published: September 10, 2018 / Updated: September 16, 2018
Vulnerability identifier: #VU14735
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2018-6555
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause denial of service attack or escalate privileges on the system.
The vulnerability exists due to a use-after-free error in irda_setsockopt() function within net/irda/af_irda.c and drivers/staging/irda/net/af_irda.c files when processing data passed to AF_IRDA socket. A local user can trigger a use-after-free error and handle the system unresponsive or execute arbitrary code with elevated privileges.
Affected software
Linux kernel
How to mitigate CVE-2018-6555
Install updates from vendor's website.
Linux kernel - addressed in versions 4.4.156, 4.9.127, 4.14.70, 4.17, 4.18.8