CVE-2021-43056

Description

An issue was discovered in the Linux kernel for powerpc before 5.14.15. It allows a malicious KVM guest to crash the host, when the host is running on Power8, due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation bug in the handling of the SRR1 register values.

References

https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337

https://lore.kernel.org/linuxppc-dev/[email protected]/T/#u

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15

http://www.openwall.com/lists/oss-security/2021/10/28/1

https://lists.fedoraproject.org/archives/list/[email protected]/message/BBM4FP3IT3JZ2O7EBS7TEOG657N4ZGRE/

https://lists.fedoraproject.org/archives/list/[email protected]/message/AA7EAPPKWG4LMTQQLNNSKATY6ST2KQFE/

https://lists.fedoraproject.org/archives/list/[email protected]/message/RRAIS3PG4EV5WFLYESR6FXWM4BJJGWVA/

Details

Risk Information

CVSS v2

CVSS v3