CVE-2024-57932: 
Linux Kernel vulnerability analysis and mitigation

A vulnerability in the Linux kernel's Google Virtual Ethernet (GVE) module has been identified and assigned CVE-2024-57932. The issue specifically affects the eXpress Data Path (XDP) xmit Network Device Operations (NDO) functionality. The vulnerability was discovered and disclosed on January 21, 2025, affecting the Linux kernel's GVE module (NVD, Debian).

The vulnerability occurs in the GVE module where dedicated XDP queues exist only when an XDP program is installed and the interface is up. The NDO XDP XMIT callback fails to properly check these conditions, leading to two potential issues: a divide-by-zero error when no XDP program is loaded (priv->numxdpqueues=0), and a NULL pointer dereference when the interface is down but numxdpqueues remains set (Kernel Commit).

The vulnerability could lead to system instability or crashes due to divide-by-zero errors and NULL pointer dereferences in the Linux kernel's networking stack, specifically affecting systems using the Google Virtual Ethernet (GVE) driver with XDP functionality (NVD).

The issue has been fixed in the Linux kernel through a patch that adds proper condition checking and synchronization. The fix includes early return conditions in the XDP XMIT callback when either no XDP program is loaded or the interface is down, along with proper synchronization using GVEPRIVFLAGSNAPIENABLED bit and synchronize_net() call (Kernel Commit).