Null pointer dereference in Linux kernel - CVE-2018-19407
Published: November 22, 2018
Vulnerability identifier: #VU16022
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-2018-19407
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the vcpu_scan_ioapic function, as defined in the arch/x86/kvm/x86.c source code file due to the failure of the I/O Advanced Programmable Interrupt Controller (I/O APIC) to initialize. A local attacker can access the system and execute an application that submits malicious system calls, trigger a NULL pointer dereference, which could result in a DoS condition.
Affected software
Linux kernel
Amazon Linux AMI
Fedora
Opensuse
linux (Ubuntu package)
linux-hwe (Ubuntu package)
kernel
kernel-headers
kernel-tools
Amazon Linux AMI
Fedora
Opensuse
linux (Ubuntu package)
linux-hwe (Ubuntu package)
kernel
kernel-headers
kernel-tools
How to mitigate CVE-2018-19407
Cybersecurity Help is currently unaware of any solutions addressing the vulnerability.
linux (Ubuntu package) - update to 4.18.0-15.16
linux-hwe (Ubuntu package) - update to 4.18.0-15.16~18.04.1
kernel - addressed in versions 4.19.5-200.fc28, 4.19.5-300.fc29
kernel-headers - addressed in versions 4.19.5-200.fc28, 4.19.5-300.fc29
kernel-tools - addressed in versions 4.19.5-200.fc28, 4.19.5-300.fc29
linux-hwe (Ubuntu package) - update to 4.18.0-15.16~18.04.1
kernel - addressed in versions 4.19.5-200.fc28, 4.19.5-300.fc29
kernel-headers - addressed in versions 4.19.5-200.fc28, 4.19.5-300.fc29
kernel-tools - addressed in versions 4.19.5-200.fc28, 4.19.5-300.fc29