CVE-2024-50096: nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error
First published: Tue Nov 05 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.1<5.4.285 | |
| Linux Kernel | >=5.5<5.10.227 | |
| Linux Kernel | >=5.11<5.15.168 | |
| Linux Kernel | >=5.16<6.1.113 | |
| Linux Kernel | >=6.2<6.6.57 | |
| Linux Kernel | >=6.7<6.11.4 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/614bfb2050982d23d53d0d51c4079dba0437c883
- https://git.kernel.org/stable/c/697e3ddcf1f8b68bd531fc34eead27c000bdf3e1
- https://git.kernel.org/stable/c/73f75d2b5aee5a735cf64b8ab4543d5c20dbbdd9
- https://git.kernel.org/stable/c/835745a377a4519decd1a36d6b926e369b3033e2
- https://git.kernel.org/stable/c/8c3de9282dde21ce3c1bf1bde3166a4510547aa9
- https://git.kernel.org/stable/c/ab4d113b6718b076046018292f821d5aa4b844f8
- https://git.kernel.org/stable/c/fd9bb7e996bab9b9049fffe3f3d3b50dee191d27
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50096
- https://nvd.nist.gov/vuln/detail/CVE-2024-50096
- https://launchpad.net/bugs/cve/CVE-2024-50096
- https://security-tracker.debian.org/tracker/CVE-2024-50096
- https://ubuntu.com/security/CVE-2024-50096
- https://git.kernel.org/linus/835745a377a4519decd1a36d6b926e369b3033e2
Frequently Asked Questions
What is the severity of CVE-2024-50096?
CVE-2024-50096 has been classified with a medium severity level.
How do I fix CVE-2024-50096?
To fix CVE-2024-50096, update your Linux kernel to the latest version that includes the patch addressing this vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-50096?
CVE-2024-50096 affects various versions of the Linux kernel, specifically versions between 5.1 and 6.12 inclusive.
What types of systems are impacted by CVE-2024-50096?
CVE-2024-50096 impacts systems running the affected versions of the Linux kernel across various distributions.
Is CVE-2024-50096 actively being exploited?
As of now, there is no confirmed active exploitation of CVE-2024-50096 in the wild.
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