CVE-2026-53199

A flaw was found in the Linux kernel's Hyper-V network virtual service client (hv_netvsc) component. This vulnerability occurs in the netvsc_copy_to_send_buf function, where incorrect memory mapping of page buffer entries can lead to a system fault. Specifically, on 32-bit x86 systems with high memory configurations, using phys_to_virt() on pages above the low memory boundary causes a fatal error during network packet transmission. An attacker could potentially trigger this condition, leading to a Denial of Service (DoS) for the affected system.

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.