CVE-2026-74534

CVE CVE-2026-74534EUVD EUVD-2026-59727Published 2026-08-15T12:27:47.000ZLast changed 2026-08-17T05:48:23.000ZCVSS 8.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix refcounting of iso_conn iso_conn_del() and iso_chan_del() have a race that results to double-put of iso_conn: [Task hdev->workqueue] [Task 2] iso_conn_del iso_chan_del iso_conn_hold_unless_zero iso_conn_lock iso_conn_lock conn->sk = NULL iso_conn_unlock sk = iso_sock_hold(conn) <---------´ if (!sk) iso_conn_put iso_conn_put iso_conn_put /* UAF */ The extra put for !sk in iso_conn_del() is currently required since failing iso_chan_add() may leave iso_conn not associated with any sk. Fix by having iso_pi(sk)->conn own refcount when non-NULL, so iso_conn_del does not need to put it. Adjust the iso_conn_add() refcounting so that conn is put if it does not get associated with an sk.

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; f53e7489273dc2bb307bf50f319b3762d45534f0; dc26097bdb864a0d5955b9a25e43376ffc1af99b <3b921533e8aa95b77aadcf31737595578e735f3c; patch: 0; 6.12.2 <6.13; a58d0f5dac322e16cc75334d000666512341bde5; patch: 6.18.44; patch: 7.1.8; patch: 7.2; dc26097bdb864a0d5955b9a25e43376ffc1af99b <fdfde532ab1caa165fcd8985001157ac8b4db365; 6.13; dc26097bdb864a0d5955b9a25e43376ffc1af99b <8208b4939afb0a1977fffe902c3ca42fe0f3baaa

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

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Linux — Linux

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