CVE-2026-74541 PUBLISHED

Bluetooth: ISO: clear iso_data always when detaching conn from hcon

Assigner: Linux
Reserved: 15.08.2026 Published: 15.08.2026 Updated: 15.08.2026

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: clear iso_data always when detaching conn from hcon

When setting conn->hcon = NULL, also conn->hcon->iso_data = NULL is necessary, otherwise later iso_conn_free() will UAF.

Fix clearing of iso_data in iso_sock_disconn()

Fixes KASAN: slab-use-after-free in iso_conn_hold_unless_zero on iso_sock_release() followed by hci_abort_conn_sync().

Vendor	Linux
Product	Linux
Versions	Default: unaffected affected from fbdc4bc47268953c80853489f696e02d61f9a2c6 to cc1d39946d62bc568551dfb81149724de1e91338 (excl.) affected from fbdc4bc47268953c80853489f696e02d61f9a2c6 to 7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0 (excl.) affected from fbdc4bc47268953c80853489f696e02d61f9a2c6 to 63c0f396a18b767eb28e895eb95bbdce6c172c59 (excl.) affected from fbdc4bc47268953c80853489f696e02d61f9a2c6 to 69a4a7b162b3db6ac337e3094cdee38f24d42ff7 (excl.) affected from fbdc4bc47268953c80853489f696e02d61f9a2c6 to d57e506f6a1e3929611340fae87c1e4823f4d85c (excl.) Version c03a10bd5b6ccb22921e04bcddc987410df7e7a9 is affected affected from 6.5.12 to 6.6 (excl.)

Vendor	Linux
Product	Linux
Versions	Default: affected Version 6.6 is affected unaffected from 0 to 6.6 (excl.) unaffected from 6.6.151 to 6.6.* (incl.) unaffected from 6.12.103 to 6.12.* (incl.) unaffected from 6.18.44 to 6.18.* (incl.) unaffected from 7.1.8 to 7.1.* (incl.) unaffected from 7.2-rc6 to * (incl.)