Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-63912

Gravedad CVSS v3.1:
CRÍTICA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
19/07/2026
Última modificación:
20/07/2026

Descripción

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> xfrm: esp: restore combined single-frag length gate<br /> <br /> The ESP out-of-place fast path appends the trailer in esp_output_head()<br /> before esp_output_tail() allocates the destination page frag. The<br /> head-side gate currently checks skb-&gt;data_len and tailen separately, but<br /> the tail code allocates a single destination frag from the combined<br /> post-trailer skb-&gt;data_len.<br /> <br /> Reject the page-frag fast path when the combined aligned length exceeds a<br /> page. Otherwise skb_page_frag_refill() may fall back to a single page while<br /> the destination sg still spans the combined skb-&gt;data_len.<br /> <br /> Restore this combined-length page gate for both IPv4 and IPv6.