CVE-2021-30178: Null Pointer Dereference
Published Apr 6, 2021
·Updated
An issue was discovered in the Linux kernel through 5.11.11. synicget in arch/x86/kvm/hyperv.c has a NULL pointer dereference for certain accesses to the SynIC Hyper-V context, aka CID-919f4ebc5987.
Affected Software
4 affected components
Linux Linux kernel<=5.11.11
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Remediation
Event History
Apr 6, 2021
CVE Published
via MITRE·11:29 PM
Data Sourced
via MITRE·11:29 PM
Description
Frequently Asked Questions
1
What is the severity of CVE-2021-30178?
CVE-2021-30178 has a high severity rating due to the potential for a NULL pointer dereference that can lead to system crashes.
2
How do I fix CVE-2021-30178?
To fix CVE-2021-30178, update to a patched version of the Linux kernel that is beyond 5.11.11.
3
What systems are affected by CVE-2021-30178?
CVE-2021-30178 affects the Linux kernel versions up to 5.11.11 and specific versions of Fedora 32, 33, and 34.
4
What type of vulnerability is CVE-2021-30178?
CVE-2021-30178 is a NULL pointer dereference vulnerability in the SynIC Hyper-V context.
5
Can CVE-2021-30178 be exploited remotely?
CVE-2021-30178 requires local access to exploit, as it involves dereferencing a NULL pointer in the kernel.