UBUNTU-CVE-2023-1872
A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation. The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered. We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.
02 / AFFECTED SOFTWARE
Affected packages
29 explicit affected versions
10 explicit affected versions
3 explicit affected versions
1 explicit affected versions
19 explicit affected versions
7 explicit affected versions
26 explicit affected versions
37 explicit affected versions
13 explicit affected versions
25 explicit affected versions
37 explicit affected versions
4 explicit affected versions
17 explicit affected versions
23 explicit affected versions
7 explicit affected versions
33 explicit affected versions
16 explicit affected versions
23 explicit affected versions
12 explicit affected versions
14 explicit affected versions
1 explicit affected versions
38 explicit affected versions
13 explicit affected versions
12 explicit affected versions
4 explicit affected versions
10 explicit affected versions
13 explicit affected versions
10 explicit affected versions
22 explicit affected versions
1 explicit affected versions
9 explicit affected versions
21 explicit affected versions
6 explicit affected versions
13 explicit affected versions
10 explicit affected versions
12 explicit affected versions
23 explicit affected versions
5 explicit affected versions
6 explicit affected versions
14 explicit affected versions
26 explicit affected versions
12 explicit affected versions
44 explicit affected versions
4 explicit affected versions
4 explicit affected versions
9 explicit affected versions
12 explicit affected versions
15 explicit affected versions
13 explicit affected versions
25 explicit affected versions
20 explicit affected versions
15 explicit affected versions
7 explicit affected versions
25 explicit affected versions
16 explicit affected versions
43 explicit affected versions
20 explicit affected versions
14 explicit affected versions
24 explicit affected versions
22 explicit affected versions
14 explicit affected versions
11 explicit affected versions
35 explicit affected versions
15 explicit affected versions
12 explicit affected versions
6 explicit affected versions
12 explicit affected versions
50 explicit affected versions
28 explicit affected versions
12 explicit affected versions
12 explicit affected versions
12 explicit affected versions
11 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation. The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered. We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=08681391b84da27133deefaaddefd0acfa90c2be
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=da24142b1ef9fd5d36b76e36bab328a5b27523e8
- https://git.kernel.org/stable/linux-stable/c/08681391b84da27133deefaaddefd0acfa90c2be
- https://git.kernel.org/stable/linux-stable/c/da24142b1ef9fd5d36b76e36bab328a5b27523e8
- https://ubuntu.com/security/CVE-2023-1872
- https://ubuntu.com/security/notices/USN-6044-1
- https://ubuntu.com/security/notices/USN-6051-1
- https://ubuntu.com/security/notices/USN-6070-1
- https://ubuntu.com/security/notices/USN-6107-1
- https://ubuntu.com/security/notices/USN-6133-1
- https://ubuntu.com/security/notices/USN-6134-1
- https://www.cve.org/CVERecord?id=CVE-2023-1872