NULL pointer dereference in Linux kernel - CVE-2018-8043
Published: April 11, 2018
Vulnerability identifier: #VU11765
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-2018-8043
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c due to improper validation of certain resource availability. A local attacker can trigger NULL pointer dereference and cause the service to crash.
The weakness exists in the unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c due to improper validation of certain resource availability. A local attacker can trigger NULL pointer dereference and cause the service to crash.
Affected software
Linux kernel
SUSE Linux
Slackware Linux
Fedora
linux-4.4.240/kernel-generic
linux-4.4.240/kernel-huge
linux-4.4.240/kernel-modules
linux-4.4.240/kernel-headers
kernel
SUSE Linux
Slackware Linux
Fedora
linux-4.4.240/kernel-generic
linux-4.4.240/kernel-huge
linux-4.4.240/kernel-modules
linux-4.4.240/kernel-headers
kernel
How to mitigate CVE-2018-8043
Update to version 4.15.9 or later.
linux-4.4.240/kernel-generic - update to 4.4.240
linux-4.4.240/kernel-huge - update to 4.4.240
linux-4.4.240/kernel-modules - update to 4.4.240
linux-4.4.240/kernel-headers - update to 4.4.240_smp
kernel - addressed in versions 4.15.9-200.fc26, 4.15.9-300.fc27
linux-4.4.240/kernel-huge - update to 4.4.240
linux-4.4.240/kernel-modules - update to 4.4.240
linux-4.4.240/kernel-headers - update to 4.4.240_smp
kernel - addressed in versions 4.15.9-200.fc26, 4.15.9-300.fc27