An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27152
Reference (s):
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=77377064c3a94911339f13ce113b3abf265e06da
- https://bugzilla.kernel.org/show_bug.cgi?id=208767
- MLIST:[oss-security] 20201103 CVE-2020-27152 Kernel: KVM: host stack overflow via loop due to lazy update IOAPIC
- URL: http://www.openwall.com/lists/oss-security/2020/11/03/1