UBUNTU-CVE-2023-52633
In the Linux kernel, the following vulnerability has been resolved: um: time-travel: fix time corruption In 'basic' time-travel mode (without =inf-cpu or =ext), we still get timer interrupts. These can happen at arbitrary points in time, i.e. while in timer_read(), which pushes time forward just a little bit. Then, if we happen to get the interrupt after calculating the new time to push to, but before actually finishing that, the interrupt will set the time to a value that's incompatible with the forward, and we'll crash because time goes backwards when we do the forwarding. Fix this by reading the time_travel_time, calculating the adjustment, and doing the adjustment all with interrupts disabled.
02 / AFFECTED SOFTWARE
Affected packages
41 explicit affected versions
16 explicit affected versions
50 explicit affected versions
57 explicit affected versions
36 explicit affected versions
47 explicit affected versions
36 explicit affected versions
7 explicit affected versions
43 explicit affected versions
44 explicit affected versions
9 explicit affected versions
3 explicit affected versions
14 explicit affected versions
5 explicit affected versions
30 explicit affected versions
9 explicit affected versions
34 explicit affected versions
10 explicit affected versions
10 explicit affected versions
9 explicit affected versions
23 explicit affected versions
4 explicit affected versions
47 explicit affected versions
45 explicit affected versions
7 explicit affected versions
11 explicit affected versions
36 explicit affected versions
28 explicit affected versions
44 explicit affected versions
47 explicit affected versions
37 explicit affected versions
1 explicit affected versions
34 explicit affected versions
20 explicit affected versions
8 explicit affected versions
9 explicit affected versions
39 explicit affected versions
12 explicit affected versions
33 explicit affected versions
37 explicit affected versions
36 explicit affected versions
44 explicit affected versions
8 explicit affected versions
18 explicit affected versions
42 explicit affected versions
10 explicit affected versions
7 explicit affected versions
7 explicit affected versions
29 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: um: time-travel: fix time corruption In 'basic' time-travel mode (without =inf-cpu or =ext), we still get timer interrupts. These can happen at arbitrary points in time, i.e. while in timer_read(), which pushes time forward just a little bit. Then, if we happen to get the interrupt after calculating the new time to push to, but before actually finishing that, the interrupt will set the time to a value that's incompatible with the forward, and we'll crash because time goes backwards when we do the forwarding. Fix this by reading the time_travel_time, calculating the adjustment, and doing the adjustment all with interrupts disabled.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/abe4eaa8618bb36c2b33e9cdde0499296a23448c
- https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab
- https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025
- https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c
- https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283
- https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c
- https://ubuntu.com/security/CVE-2023-52633
- https://ubuntu.com/security/notices/USN-6766-1
- https://ubuntu.com/security/notices/USN-6766-2
- https://ubuntu.com/security/notices/USN-6766-3
- https://ubuntu.com/security/notices/USN-6795-1
- https://ubuntu.com/security/notices/USN-6818-1
- https://ubuntu.com/security/notices/USN-6818-2
- https://ubuntu.com/security/notices/USN-6818-3
- https://ubuntu.com/security/notices/USN-6818-4
- https://ubuntu.com/security/notices/USN-6819-1
- https://ubuntu.com/security/notices/USN-6819-2
- https://ubuntu.com/security/notices/USN-6819-3
- https://ubuntu.com/security/notices/USN-6819-4
- https://ubuntu.com/security/notices/USN-6828-1
- https://www.cve.org/CVERecord?id=CVE-2023-52633