UBUNTU-CVE-2021-3640
A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
11 explicit affected versions
6 explicit affected versions
57 explicit affected versions
11 explicit affected versions
191 explicit affected versions
75 explicit affected versions
37 explicit affected versions
55 explicit affected versions
28 explicit affected versions
6 explicit affected versions
87 explicit affected versions
2 explicit affected versions
4 explicit affected versions
121 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
21 explicit affected versions
5 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
11 explicit affected versions
1 explicit affected versions
7 explicit affected versions
11 explicit affected versions
41 explicit affected versions
2 explicit affected versions
49 explicit affected versions
11 explicit affected versions
40 explicit affected versions
120 explicit affected versions
30 explicit affected versions
10 explicit affected versions
24 explicit affected versions
53 explicit affected versions
1 explicit affected versions
23 explicit affected versions
2 explicit affected versions
1 explicit affected versions
29 explicit affected versions
13 explicit affected versions
69 explicit affected versions
1 explicit affected versions
42 explicit affected versions
33 explicit affected versions
10 explicit affected versions
188 explicit affected versions
54 explicit affected versions
11 explicit affected versions
12 explicit affected versions
77 explicit affected versions
7 explicit affected versions
40 explicit affected versions
2 explicit affected versions
73 explicit affected versions
165 explicit affected versions
37 explicit affected versions
1 explicit affected versions
8 explicit affected versions
19 explicit affected versions
32 explicit affected versions
2 explicit affected versions
1 explicit affected versions
1 explicit affected versions
35 explicit affected versions
5 explicit affected versions
31 explicit affected versions
1 explicit affected versions
30 explicit affected versions
12 explicit affected versions
1 explicit affected versions
31 explicit affected versions
10 explicit affected versions
2 explicit affected versions
28 explicit affected versions
44 explicit affected versions
16 explicit affected versions
13 explicit affected versions
24 explicit affected versions
38 explicit affected versions
9 explicit affected versions
30 explicit affected versions
97 explicit affected versions
11 explicit affected versions
85 explicit affected versions
62 explicit affected versions
4 explicit affected versions
19 explicit affected versions
53 explicit affected versions
30 explicit affected versions
43 explicit affected versions
1 explicit affected versions
102 explicit affected versions
12 explicit affected versions
32 explicit affected versions
4 explicit affected versions
19 explicit affected versions
1 explicit affected versions
9 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=99c23da0eed4fd20cae8243f2b51e10e66aa0951
- https://ubuntu.com/security/CVE-2021-3640
- https://ubuntu.com/security/notices/USN-5265-1
- https://ubuntu.com/security/notices/USN-5267-1
- https://ubuntu.com/security/notices/USN-5267-3
- https://ubuntu.com/security/notices/USN-5268-1
- https://www.cve.org/CVERecord?id=CVE-2021-3640
- https://www.openwall.com/lists/oss-security/2021/07/22/1
- https://x-lore.kernel.org/all/[email protected]/
- https://x-lore.kernel.org/all/[email protected]/
- https://x-lore.kernel.org/all/[email protected]/