CVE-2021-47096 ALSA: rawmidi - fix the uninitalized user_pversion
An uninitialized memory flaw in the Linux kernel ALSA rawmidi driver could allow local attackers to read sensitive kernel memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-47096?
CVE-2021-47096 is a medium-severity vulnerability in Linux kernel, published on 4 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: rawmidi - fix the uninitalized user_pversion
The user_pversion was uninitialized for the user space file structure in the open function, because the file private structure use kmalloc for the allocation.
The kernel ALSA sequencer code clears the file structure, so no additional fixes are required.
BugLink: https://github.com/alsa-project/alsa-lib/issues/178
Weakness: CWE-908
Which versions are affected by CVE-2021-47096?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47096?
Apply the vendor's patch.
Is CVE-2021-47096 being exploited?
There is no known exploitation of CVE-2021-47096 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47096, GHSA-5gr3-55rj-mm4c, UBUNTU-CVE-2021-47096.