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.

Classification

CVE ID: CVE-2024-50096

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 5.0% (scored less or equal to compared to others)

EPSS Date: 2025-06-02 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2024-50096
https://git.kernel.org/stable/c/fd9bb7e996bab9b9049fffe3f3d3b50dee191d27
https://git.kernel.org/stable/c/73f75d2b5aee5a735cf64b8ab4543d5c20dbbdd9
https://git.kernel.org/stable/c/8c3de9282dde21ce3c1bf1bde3166a4510547aa9
https://git.kernel.org/stable/c/614bfb2050982d23d53d0d51c4079dba0437c883
https://git.kernel.org/stable/c/697e3ddcf1f8b68bd531fc34eead27c000bdf3e1
https://git.kernel.org/stable/c/ab4d113b6718b076046018292f821d5aa4b844f8
https://git.kernel.org/stable/c/835745a377a4519decd1a36d6b926e369b3033e2

Timeline