CVE-2024-50096
Description
In the Linux kernel, the following vulnerability has been resolved: nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error The `nouveau_dmem_copy_one` function ensures that the copy push command is sent to the device firmware but does not track whether it was executed successfully. In the case of a copy error (e.g., firmware or hardware failure), the copy push command will be sent via the firmware channel, and `nouveau_dmem_copy_one` will likely report success, leading to the `migrate_to_ram` function returning a dirty HIGH_USER page to the user. This can result in a security vulnerability, as a HIGH_USER page that may contain sensitive or corrupted data could be returned to the user. To prevent this vulnerability, we allocate a zero page. Thus, in case of an error, a non-dirty (zero) page will be returned to the user.
How to fix
- linux linux_kernel5.4.285, 5.10.227, 5.15.168, 6.1.113, 6.6.57, 6.11.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.1 ≤ v < 5.4.285, 5.5 ≤ v < 5.10.227, 5.11 ≤ v < 5.15.168, 5.16 ≤ v < 6.1.113, 6.2 ≤ v < 6.6.57, 6.7 ≤ v < 6.11.4, 6.12 | 5.4.285, 5.10.227, 5.15.168, 6.1.113, 6.6.57, 6.11.4 |
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