UBUNTU-CVE-2020-26541
The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
3 explicit affected versions
6 explicit affected versions
57 explicit affected versions
9 explicit affected versions
191 explicit affected versions
35 explicit affected versions
85 explicit affected versions
118 explicit affected versions
4 explicit affected versions
121 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
21 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
111 explicit affected versions
3 explicit affected versions
1 explicit affected versions
38 explicit affected versions
46 explicit affected versions
3 explicit affected versions
38 explicit affected versions
120 explicit affected versions
10 explicit affected versions
22 explicit affected versions
1 explicit affected versions
19 explicit affected versions
144 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
1 explicit affected versions
40 explicit affected versions
33 explicit affected versions
10 explicit affected versions
188 explicit affected versions
11 explicit affected versions
3 explicit affected versions
6 explicit affected versions
38 explicit affected versions
138 explicit affected versions
2 explicit affected versions
132 explicit affected versions
165 explicit affected versions
154 explicit affected versions
34 explicit affected versions
139 explicit affected versions
116 explicit affected versions
93 explicit affected versions
1 explicit affected versions
6 explicit affected versions
17 explicit affected versions
92 explicit affected versions
1 explicit affected versions
1 explicit affected versions
98 explicit affected versions
5 explicit affected versions
28 explicit affected versions
1 explicit affected versions
28 explicit affected versions
3 explicit affected versions
1 explicit affected versions
140 explicit affected versions
94 explicit affected versions
10 explicit affected versions
26 explicit affected versions
44 explicit affected versions
16 explicit affected versions
2 explicit affected versions
22 explicit affected versions
38 explicit affected versions
167 explicit affected versions
9 explicit affected versions
28 explicit affected versions
97 explicit affected versions
9 explicit affected versions
121 explicit affected versions
4 explicit affected versions
28 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
30 explicit affected versions
4 explicit affected versions
17 explicit affected versions
1 explicit affected versions
69 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.
05 / REFERENCES
Further evidence
- https://lkml.org/lkml/2020/9/15/1871
- https://lore.kernel.org/lkml/161428671215.677100.6372209948022011988.stgit@warthog.procyon.org.uk/
- https://lore.kernel.org/lkml/[email protected]/
- https://lore.kernel.org/lkml/[email protected]/
- https://lore.kernel.org/lkml/[email protected]/
- https://ubuntu.com/security/CVE-2020-26541
- https://ubuntu.com/security/notices/USN-5070-1
- https://ubuntu.com/security/notices/USN-5106-1
- https://ubuntu.com/security/notices/USN-5120-1
- https://ubuntu.com/security/notices/USN-5210-1
- https://www.cve.org/CVERecord?id=CVE-2020-26541