CVE-2018-19407: Null Pointer Dereference
Last updated 4 July 2026
Other sources
The vcpuscanioapic function in arch/x86/kvm/x86.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where ioapic is uninitialized.
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.262-1Fixed in 6.1.176-1Fixed in 6.1.180-1Fixed in 6.12.94-1Fixed in 6.12.101-1Fixed in 7.1.8-1Fixed in 7.1.8-2 - Upgrade
Upgrade
Linux kernel (KVM)to a version that resolves this vulnerability.Fixed in 4.19.2
Event History
Frequently Asked Questions
What is the severity of CVE-2018-19407?
CVE-2018-19407 is classified as a denial of service vulnerability due to its potential to cause a NULL pointer dereference.
How do I fix CVE-2018-19407?
To mitigate CVE-2018-19407, users should upgrade to a patched version of the Linux kernel, specifically versions 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, or 6.12.10-1.
Which Linux kernel versions are affected by CVE-2018-19407?
CVE-2018-19407 affects the Linux kernel versions up to and including 4.19.2.
Can CVE-2018-19407 be exploited remotely?
CVE-2018-19407 requires local access to exploit, making it less likely to be exploited remotely.
What systems are impacted by CVE-2018-19407?
CVE-2018-19407 impacts systems running specific distributions of the Linux kernel, particularly Debian and Ubuntu versions mentioned in the advisory.