UBUNTU-CVE-2021-31829
kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
57 explicit affected versions
1 explicit affected versions
191 explicit affected versions
67 explicit affected versions
27 explicit affected versions
47 explicit affected versions
20 explicit affected versions
77 explicit affected versions
1 explicit affected versions
121 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
19 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
1 explicit affected versions
29 explicit affected versions
37 explicit affected versions
29 explicit affected versions
120 explicit affected versions
22 explicit affected versions
10 explicit affected versions
14 explicit affected versions
44 explicit affected versions
1 explicit affected versions
12 explicit affected versions
144 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
61 explicit affected versions
1 explicit affected versions
32 explicit affected versions
33 explicit affected versions
10 explicit affected versions
188 explicit affected versions
46 explicit affected versions
11 explicit affected versions
69 explicit affected versions
1 explicit affected versions
29 explicit affected versions
2 explicit affected versions
64 explicit affected versions
165 explicit affected versions
25 explicit affected versions
1 explicit affected versions
9 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
26 explicit affected versions
1 explicit affected versions
19 explicit affected versions
1 explicit affected versions
20 explicit affected versions
1 explicit affected versions
23 explicit affected versions
9 explicit affected versions
18 explicit affected versions
44 explicit affected versions
16 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
19 explicit affected versions
97 explicit affected versions
3 explicit affected versions
77 explicit affected versions
54 explicit affected versions
1 explicit affected versions
13 explicit affected versions
45 explicit affected versions
19 explicit affected versions
43 explicit affected versions
1 explicit affected versions
92 explicit affected versions
12 explicit affected versions
22 explicit affected versions
4 explicit affected versions
9 explicit affected versions
1 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.
05 / REFERENCES
Further evidence
- https://ubuntu.com/security/CVE-2021-31829
- https://ubuntu.com/security/notices/USN-4983-1
- https://ubuntu.com/security/notices/USN-4997-1
- https://ubuntu.com/security/notices/USN-4997-2
- https://ubuntu.com/security/notices/USN-4999-1
- https://ubuntu.com/security/notices/USN-5000-1
- https://ubuntu.com/security/notices/USN-5000-2
- https://ubuntu.com/security/notices/USN-5018-1
- https://www.cve.org/CVERecord?id=CVE-2021-31829
- https://www.openwall.com/lists/oss-security/2021/05/04/4