UBUNTU-CVE-2021-43056
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.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
8 explicit affected versions
6 explicit affected versions
9 explicit affected versions
35 explicit affected versions
3 explicit affected versions
4 explicit affected versions
23 explicit affected versions
1 explicit affected versions
21 explicit affected versions
2 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
8 explicit affected versions
1 explicit affected versions
7 explicit affected versions
9 explicit affected versions
38 explicit affected versions
46 explicit affected versions
8 explicit affected versions
38 explicit affected versions
10 explicit affected versions
22 explicit affected versions
1 explicit affected versions
21 explicit affected versions
29 explicit affected versions
13 explicit affected versions
40 explicit affected versions
33 explicit affected versions
10 explicit affected versions
11 explicit affected versions
10 explicit affected versions
7 explicit affected versions
38 explicit affected versions
34 explicit affected versions
1 explicit affected versions
6 explicit affected versions
17 explicit affected versions
1 explicit affected versions
5 explicit affected versions
28 explicit affected versions
1 explicit affected versions
28 explicit affected versions
9 explicit affected versions
1 explicit affected versions
10 explicit affected versions
26 explicit affected versions
44 explicit affected versions
16 explicit affected versions
7 explicit affected versions
22 explicit affected versions
38 explicit affected versions
9 explicit affected versions
28 explicit affected versions
9 explicit affected versions
4 explicit affected versions
28 explicit affected versions
43 explicit affected versions
1 explicit affected versions
30 explicit affected versions
4 explicit affected versions
17 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- http://www.openwall.com/lists/oss-security/2021/10/28/1
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
- https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337
- https://lore.kernel.org/linuxppc-dev/[email protected]/T/#u
- https://ubuntu.com/security/CVE-2021-43056
- https://ubuntu.com/security/notices/USN-5139-1
- https://ubuntu.com/security/notices/USN-5165-1
- https://ubuntu.com/security/notices/USN-5208-1
- https://ubuntu.com/security/notices/USN-5210-1
- https://ubuntu.com/security/notices/USN-5218-1
- https://www.cve.org/CVERecord?id=CVE-2021-43056