CVE-2023-53192

A flaw was found in the Linux kernel's Virtual Extensible LAN (VXLAN) implementation. An attacker with elevated privileges (CAP_NET_ADMIN) can exploit this vulnerability by configuring the system to accept and forward VXLAN packets. The issue arises from an incorrect nexthop hash size, where a 32-bit hash is used instead of the expected 31-bit hash, leading to negative hash values. This can cause an out-of-bounds write in the nexthop group selection, resulting in a kernel panic and a denial of service (DoS).

This vulnerability requires elevated privileges (CAP_NET_ADMIN) to exploit, since it can only be triggered if the system is configured to accept and forward VXLAN packets.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.