CVE-2023-52633
Description
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.
How to fix
- linux linux_kernel5.15.149, 6.1.77, 6.6.16, 6.7.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 5.15.149, 5.16 ≤ v < 6.1.77, 6.2 ≤ v < 6.6.16, 6.7 ≤ v < 6.7.4 | 5.15.149, 6.1.77, 6.6.16, 6.7.4 |
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