CVE-2024-50096

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/614bfb2050982d23d53d0d51c4079dba0437c883 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/614bfb2050982d23d53d0d51c4079dba0437c883Patch
• https://git.kernel.org/stable/c/697e3ddcf1f8b68bd531fc34eead27c000bdf3e1Patch
• https://git.kernel.org/stable/c/73f75d2b5aee5a735cf64b8ab4543d5c20dbbdd9Patch
• https://git.kernel.org/stable/c/835745a377a4519decd1a36d6b926e369b3033e2Patch
• https://git.kernel.org/stable/c/8c3de9282dde21ce3c1bf1bde3166a4510547aa9Patch
• https://git.kernel.org/stable/c/ab4d113b6718b076046018292f821d5aa4b844f8Patch
• https://git.kernel.org/stable/c/fd9bb7e996bab9b9049fffe3f3d3b50dee191d27Patch
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html