UBUNTU-CVE-2021-20321
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
8 explicit affected versions
6 explicit affected versions
9 explicit affected versions
191 explicit affected versions
74 explicit affected versions
35 explicit affected versions
54 explicit affected versions
27 explicit affected versions
2 explicit affected versions
86 explicit affected versions
4 explicit affected versions
23 explicit affected versions
86 explicit affected versions
1 explicit affected versions
1 explicit affected versions
21 explicit affected versions
2 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
8 explicit affected versions
1 explicit affected versions
7 explicit affected versions
9 explicit affected versions
38 explicit affected versions
46 explicit affected versions
8 explicit affected versions
38 explicit affected versions
29 explicit affected versions
10 explicit affected versions
152 explicit affected versions
22 explicit affected versions
85 explicit affected versions
52 explicit affected versions
1 explicit affected versions
21 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
68 explicit affected versions
1 explicit affected versions
40 explicit affected versions
33 explicit affected versions
10 explicit affected versions
53 explicit affected versions
11 explicit affected versions
10 explicit affected versions
76 explicit affected versions
7 explicit affected versions
38 explicit affected versions
2 explicit affected versions
72 explicit affected versions
34 explicit affected versions
1 explicit affected versions
6 explicit affected versions
17 explicit affected versions
30 explicit affected versions
1 explicit affected versions
1 explicit affected versions
34 explicit affected versions
5 explicit affected versions
28 explicit affected versions
1 explicit affected versions
28 explicit affected versions
9 explicit affected versions
1 explicit affected versions
30 explicit affected versions
10 explicit affected versions
26 explicit affected versions
44 explicit affected versions
16 explicit affected versions
7 explicit affected versions
22 explicit affected versions
38 explicit affected versions
9 explicit affected versions
129 explicit affected versions
28 explicit affected versions
63 explicit affected versions
9 explicit affected versions
84 explicit affected versions
61 explicit affected versions
4 explicit affected versions
18 explicit affected versions
52 explicit affected versions
28 explicit affected versions
43 explicit affected versions
1 explicit affected versions
108 explicit affected versions
101 explicit affected versions
30 explicit affected versions
4 explicit affected versions
17 explicit affected versions
1 explicit affected versions
8 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/a295aef603e109a47af355477326bd41151765b6
- https://ubuntu.com/security/CVE-2021-20321
- https://ubuntu.com/security/notices/USN-5208-1
- https://ubuntu.com/security/notices/USN-5209-1
- https://ubuntu.com/security/notices/USN-5210-1
- https://ubuntu.com/security/notices/USN-5218-1
- https://ubuntu.com/security/notices/USN-6221-1
- https://www.cve.org/CVERecord?id=CVE-2021-20321