UBUNTU-CVE-2021-3679
A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
4 explicit affected versions
6 explicit affected versions
5 explicit affected versions
191 explicit affected versions
70 explicit affected versions
31 explicit affected versions
50 explicit affected versions
23 explicit affected versions
82 explicit affected versions
4 explicit affected versions
23 explicit affected versions
69 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
4 explicit affected versions
1 explicit affected versions
3 explicit affected versions
33 explicit affected versions
42 explicit affected versions
4 explicit affected versions
33 explicit affected versions
25 explicit affected versions
10 explicit affected versions
135 explicit affected versions
18 explicit affected versions
68 explicit affected versions
48 explicit affected versions
1 explicit affected versions
20 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
64 explicit affected versions
1 explicit affected versions
36 explicit affected versions
33 explicit affected versions
10 explicit affected versions
49 explicit affected versions
11 explicit affected versions
5 explicit affected versions
72 explicit affected versions
7 explicit affected versions
34 explicit affected versions
2 explicit affected versions
68 explicit affected versions
30 explicit affected versions
1 explicit affected versions
2 explicit affected versions
13 explicit affected versions
26 explicit affected versions
1 explicit affected versions
1 explicit affected versions
30 explicit affected versions
5 explicit affected versions
23 explicit affected versions
1 explicit affected versions
24 explicit affected versions
4 explicit affected versions
1 explicit affected versions
26 explicit affected versions
10 explicit affected versions
22 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
18 explicit affected versions
38 explicit affected versions
9 explicit affected versions
112 explicit affected versions
24 explicit affected versions
47 explicit affected versions
5 explicit affected versions
80 explicit affected versions
57 explicit affected versions
4 explicit affected versions
14 explicit affected versions
48 explicit affected versions
23 explicit affected versions
43 explicit affected versions
1 explicit affected versions
90 explicit affected versions
97 explicit affected versions
12 explicit affected versions
26 explicit affected versions
4 explicit affected versions
13 explicit affected versions
1 explicit affected versions
4 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/67f0d6d9883c13174669f88adac4f0ee656cc16a
- https://ubuntu.com/security/CVE-2021-3679
- https://ubuntu.com/security/notices/USN-5091-1
- https://ubuntu.com/security/notices/USN-5091-2
- https://ubuntu.com/security/notices/USN-5092-1
- https://ubuntu.com/security/notices/USN-5092-2
- https://ubuntu.com/security/notices/USN-5094-1
- https://ubuntu.com/security/notices/USN-5094-2
- https://ubuntu.com/security/notices/USN-5096-1
- https://ubuntu.com/security/notices/USN-5115-1
- https://ubuntu.com/security/notices/USN-5299-1
- https://ubuntu.com/security/notices/USN-5343-1
- https://www.cve.org/CVERecord?id=CVE-2021-3679