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CVE-2026-64128

Bluetooth: ISO: drop ISO_END frames received without prior ISO_START PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: drop ISO_END frames received without prior ISO_START ISO data PDUs carry a packet-boundary flag indicating START, CONT, END or SINGLE. The ISO_CONT branch of iso_recv() guards against a missing ISO_START by checking conn->rx_len before touching conn->rx_skb, but ISO_END does not. If a peer sends an ISO_END as the first packet on a fresh ISO connection, conn->rx_skb is still NULL and conn->rx_len is zero, so skb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS, where receivers sync to a broadcaster without pairing, any broadcaster on the air can trigger this. Mirror the ISO_CONT check at the top of ISO_END so a stray end fragment is logged and dropped instead of crashing the host.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 1c3d1e1696b72579b970e17999c503a14535205b; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 3af41ee7ebecb0d5c8a504861f6cfad31345310f; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 39f4a82e80c8f5ed2d6952d73fbafc895721a728; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 61f2410a96dee808029e2ae4d6ef2dd635f3477f; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before e3a799881c12d27596232636a607e2e3fa448d63; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 84c24fb151fc1179355296d7ff29129ac7c42129
Linux / Linuxaffected 6.0; unaffected 0 before 6.0; unaffected 6.1.175 through 6.1.*; unaffected 6.6.142 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References