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

CVE-2026-64096

Gravedad CVSS v3.1:
ALTA
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 /> batman-adv: mcast: fix use-after-free in orig_node RCU release<br /> <br /> batadv_mcast_purge_orig() removes entries from RCU-protected hlists but<br /> does not wait for an RCU grace period before returning. Concurrent RCU<br /> readers may still accesses references to those entries at the point of<br /> removal. RCU-protected readers trying to operate on entries like<br /> orig-&gt;mcast_want_all_ipv6_node will then access already freed memory.<br /> <br /> Fix this by moving batadv_mcast_purge_orig() to batadv_orig_node_release(),<br /> just before the call_rcu() invocation. This ensures RCU readers that were<br /> active at purge time have drained before the orig_node memory is reclaimed.