CVE-2026-74533
CVE CVE-2026-74533EUVD EUVD-2026-59726Published 2026-08-15T12:27:47.000ZLast changed 2026-08-17T05:48:22.000ZCVSS 8.8
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 6.11.11 <6.12; patch: 0; a58d0f5dac322e16cc75334d000666512341bde5; 6.13; dc26097bdb864a0d5955b9a25e43376ffc1af99b <af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c; 6.12.2 <6.13; patch: 7.1.8; f53e7489273dc2bb307bf50f319b3762d45534f0; dc26097bdb864a0d5955b9a25e43376ffc1af99b <876a3e94c70d0859d1dad1c986112d4f0d99eba8; patch: 7.2
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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