UBUNTU-CVE-2021-4203
A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.
02 / AFFECTED SOFTWARE
Affected packages
33 explicit affected versions
10 explicit affected versions
7 explicit affected versions
9 explicit affected versions
37 explicit affected versions
67 explicit affected versions
1 explicit affected versions
39 explicit affected versions
45 explicit affected versions
8 explicit affected versions
37 explicit affected versions
28 explicit affected versions
10 explicit affected versions
149 explicit affected versions
50 explicit affected versions
21 explicit affected versions
82 explicit affected versions
51 explicit affected versions
1 explicit affected versions
21 explicit affected versions
1 explicit affected versions
6 explicit affected versions
8 explicit affected versions
6 explicit affected versions
8 explicit affected versions
191 explicit affected versions
73 explicit affected versions
34 explicit affected versions
53 explicit affected versions
29 explicit affected versions
26 explicit affected versions
2 explicit affected versions
85 explicit affected versions
4 explicit affected versions
23 explicit affected versions
83 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
13 explicit affected versions
16 explicit affected versions
1 explicit affected versions
7 explicit affected versions
52 explicit affected versions
11 explicit affected versions
12 explicit affected versions
75 explicit affected versions
7 explicit affected versions
37 explicit affected versions
2 explicit affected versions
71 explicit affected versions
33 explicit affected versions
1 explicit affected versions
5 explicit affected versions
16 explicit affected versions
29 explicit affected versions
1 explicit affected versions
1 explicit affected versions
33 explicit affected versions
5 explicit affected versions
27 explicit affected versions
1 explicit affected versions
27 explicit affected versions
9 explicit affected versions
1 explicit affected versions
29 explicit affected versions
10 explicit affected versions
25 explicit affected versions
44 explicit affected versions
16 explicit affected versions
7 explicit affected versions
21 explicit affected versions
38 explicit affected versions
9 explicit affected versions
126 explicit affected versions
27 explicit affected versions
61 explicit affected versions
8 explicit affected versions
83 explicit affected versions
60 explicit affected versions
4 explicit affected versions
17 explicit affected versions
51 explicit affected versions
27 explicit affected versions
43 explicit affected versions
1 explicit affected versions
105 explicit affected versions
100 explicit affected versions
29 explicit affected versions
4 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.
05 / REFERENCES
Further evidence
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2230
- https://git.kernel.org/linus/35306eb23814444bd4021f8a1c3047d3cb0c8b2b
- https://ubuntu.com/security/CVE-2021-4203
- https://ubuntu.com/security/notices/USN-6001-1
- https://ubuntu.com/security/notices/USN-6013-1
- https://ubuntu.com/security/notices/USN-6014-1
- https://www.cve.org/CVERecord?id=CVE-2021-4203