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CVE-2026-74533

8.8 high SSVC exploitation: none Published
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero hci_conn::iso_data is accessed and modified without lock or RCU. This leads to a race [Task hdev->workqueue] [Task 2] iso_recv iso_conn_put(conn) conn = LOAD hcon->iso_data iso_conn_free(conn) iso_conn_hold_unless_zero(conn) hcon->iso_data = NULL kfree(conn) kref_get_unless_zero(&conn->ref) /* UAF */ and also to races in iso_conn_add() vs. iso_conn_free(). Fix by adding spinlock hci_conn::proto_lock and using it to guard hci_conn::iso_data.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 5

  1. StatusReceived → PublishedNVD modified 2026-10-21 12:45
  2. References+1 references (now 3)NVD modified 2026-10-21 13:19
  3. StatusPublished → ReceivedNVD modified 2026-10-21 13:19
  4. StatusReceived → PublishedNVD modified 2026-10-21 12:45
  5. First seenCVSS 8.8NVD modified 2026-10-16 20:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3