CVE-2025-38403 vsock/vmci: Clear the vmci transport packet properly when initializing it
An attacker can read uninitialized kernel memory via the VMCI transport packet due to missing initialization, potentially exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-38403?
CVE-2025-38403 is a high-severity vulnerability in Debian Debian Linux, published on 25 Jul 2025. 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:
vsock/vmci: Clear the vmci transport packet properly when initializing it
In vmci_transport_packet_init memset the vmci_transport_packet before populating the fields to avoid any uninitialised data being left in the structure.
Which versions are affected by CVE-2025-38403?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38403?
Apply the vendor's patch.
Is CVE-2025-38403 being exploited?
There is no known exploitation of CVE-2025-38403 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-65771, AZL-73025, BELL-CVE-2025-38403, DEBIAN-CVE-2025-38403, GHSA-x4m7-9hjr-rhx2, ROOT-OS-DEBIAN-11-CVE-2025-38403 and 4 more.