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

CVE-2026-63946

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 /> Bluetooth: ISO: fix UAF in iso_recv_frame<br /> <br /> iso_recv_frame reads conn-&gt;sk under iso_conn_lock but releases the lock<br /> before using sk, with no reference held. A concurrent iso_sock_kill()<br /> can free sk in that window, causing use-after-free on sk-&gt;sk_state and<br /> sock_queue_rcv_skb().<br /> <br /> Fix by replacing the bare pointer read with iso_sock_hold(conn), which<br /> calls sock_hold() while the spinlock is held, atomically elevating the<br /> refcount before the lock drops. Add a drop_put label so sock_put() is<br /> called on all exit paths where the hold succeeded.