UBUNTU-CVE-2021-38199
fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for those servers to be unreachable during trunking detection.
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
72 explicit affected versions
31 explicit affected versions
52 explicit affected versions
25 explicit affected versions
84 explicit affected versions
4 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
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
27 explicit affected versions
10 explicit affected versions
18 explicit affected versions
50 explicit affected versions
1 explicit affected versions
19 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
66 explicit affected versions
1 explicit affected versions
36 explicit affected versions
33 explicit affected versions
10 explicit affected versions
51 explicit affected versions
11 explicit affected versions
5 explicit affected versions
74 explicit affected versions
6 explicit affected versions
34 explicit affected versions
70 explicit affected versions
30 explicit affected versions
1 explicit affected versions
2 explicit affected versions
13 explicit affected versions
28 explicit affected versions
1 explicit affected versions
1 explicit affected versions
32 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
28 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
24 explicit affected versions
5 explicit affected versions
82 explicit affected versions
59 explicit affected versions
4 explicit affected versions
16 explicit affected versions
50 explicit affected versions
23 explicit affected versions
43 explicit affected versions
1 explicit affected versions
99 explicit affected versions
12 explicit affected versions
26 explicit affected versions
4 explicit affected versions
13 explicit affected versions
1 explicit affected versions
6 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for those servers to be unreachable during trunking detection.
05 / REFERENCES
Further evidence
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://github.com/torvalds/linux/commit/dd99e9f98fbf423ff6d365b37a98e8879170f17c
- https://ubuntu.com/security/CVE-2021-38199
- 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-5096-1
- https://ubuntu.com/security/notices/USN-5106-1
- https://ubuntu.com/security/notices/USN-5120-1
- https://ubuntu.com/security/notices/USN-5136-1
- https://www.cve.org/CVERecord?id=CVE-2021-38199