UBUNTU-CVE-2021-4159
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
26 explicit affected versions
93 explicit affected versions
52 explicit affected versions
72 explicit affected versions
43 explicit affected versions
106 explicit affected versions
4 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
21 explicit affected versions
10 explicit affected versions
7 explicit affected versions
12 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
57 explicit affected versions
16 explicit affected versions
65 explicit affected versions
55 explicit affected versions
47 explicit affected versions
10 explicit affected versions
37 explicit affected versions
69 explicit affected versions
1 explicit affected versions
2 explicit affected versions
26 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
86 explicit affected versions
1 explicit affected versions
57 explicit affected versions
33 explicit affected versions
10 explicit affected versions
71 explicit affected versions
11 explicit affected versions
12 explicit affected versions
94 explicit affected versions
7 explicit affected versions
55 explicit affected versions
89 explicit affected versions
53 explicit affected versions
1 explicit affected versions
23 explicit affected versions
34 explicit affected versions
47 explicit affected versions
1 explicit affected versions
1 explicit affected versions
52 explicit affected versions
5 explicit affected versions
47 explicit affected versions
1 explicit affected versions
44 explicit affected versions
12 explicit affected versions
49 explicit affected versions
10 explicit affected versions
41 explicit affected versions
44 explicit affected versions
16 explicit affected versions
37 explicit affected versions
38 explicit affected versions
9 explicit affected versions
45 explicit affected versions
22 explicit affected versions
100 explicit affected versions
78 explicit affected versions
4 explicit affected versions
35 explicit affected versions
70 explicit affected versions
45 explicit affected versions
43 explicit affected versions
12 explicit affected versions
121 explicit affected versions
45 explicit affected versions
4 explicit affected versions
34 explicit affected versions
1 explicit affected versions
25 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
05 / REFERENCES
Further evidence
- https://ubuntu.com/security/CVE-2021-4159
- https://ubuntu.com/security/notices/USN-5668-1
- https://ubuntu.com/security/notices/USN-5677-1
- https://ubuntu.com/security/notices/USN-5682-1
- https://ubuntu.com/security/notices/USN-5706-1
- https://ubuntu.com/security/notices/USN-5790-1
- https://www.cve.org/CVERecord?id=CVE-2021-4159