CVE-2021-30178: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in the Linux kernel through 5.11.11. synic_get in arch/x86/kvm/hyperv.c has a NULL pointer dereference for certain accesses to the SynIC Hyper-V context, aka CID-919f4ebc5987.

Affected products

• Fedoraproject Fedora: version 32 only; version 33 only; version 34 only
• Linux Linux Kernel: up to and including 5.11.11

Published 2021-04-07. Last modified 2026-06-17.