UBUNTU-CVE-2020-10767
A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to perform a Spectre V2 style attack when this configuration is active. The highest threat from this vulnerability is to confidentiality.
02 / AFFECTED SOFTWARE
Affected packages
81 explicit affected versions
42 explicit affected versions
6 explicit affected versions
23 explicit affected versions
6 explicit affected versions
47 explicit affected versions
12 explicit affected versions
28 explicit affected versions
2 explicit affected versions
54 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
5 explicit affected versions
1 explicit affected versions
12 explicit affected versions
16 explicit affected versions
49 explicit affected versions
18 explicit affected versions
12 explicit affected versions
4 explicit affected versions
10 explicit affected versions
27 explicit affected versions
48 explicit affected versions
26 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
9 explicit affected versions
44 explicit affected versions
1 explicit affected versions
14 explicit affected versions
23 explicit affected versions
23 explicit affected versions
6 explicit affected versions
11 explicit affected versions
83 explicit affected versions
12 explicit affected versions
2 explicit affected versions
47 explicit affected versions
4 explicit affected versions
51 explicit affected versions
1 explicit affected versions
112 explicit affected versions
51 explicit affected versions
5 explicit affected versions
60 explicit affected versions
1 explicit affected versions
6 explicit affected versions
2 explicit affected versions
1 explicit affected versions
2 explicit affected versions
1 explicit affected versions
5 explicit affected versions
70 explicit affected versions
2 explicit affected versions
29 explicit affected versions
44 explicit affected versions
14 explicit affected versions
26 explicit affected versions
9 explicit affected versions
38 explicit affected versions
8 explicit affected versions
90 explicit affected versions
2 explicit affected versions
73 explicit affected versions
25 explicit affected versions
37 explicit affected versions
2 explicit affected versions
31 explicit affected versions
1 explicit affected versions
12 explicit affected versions
6 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to perform a Spectre V2 style attack when this configuration is active. The highest threat from this vulnerability is to confidentiality.
05 / REFERENCES
Further evidence
- https://ubuntu.com/security/CVE-2020-10767
- https://ubuntu.com/security/notices/USN-4427-1
- https://ubuntu.com/security/notices/USN-4439-1
- https://ubuntu.com/security/notices/USN-4440-1
- https://ubuntu.com/security/notices/USN-4483-1
- https://ubuntu.com/security/notices/USN-4485-1
- https://www.cve.org/CVERecord?id=CVE-2020-10767
- https://www.openwall.com/lists/oss-security/2020/06/10/1