CVE-2026-74537

CVE CVE-2026-74537EUVD EUVD-2026-59730Published 2026-08-15T12:27:49.000ZLast changed 2026-08-17T05:48:25.000ZCVSS 8.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: hold sk properly in iso_conn_ready sk deref in iso_conn_ready must be done either under conn->lock, or holding a refcount, to avoid concurrent close. conn->sk is currently accessed without either: [Task 1] [Task 2] iso_sock_release iso_conn_ready sk = conn->sk lock_sock(sk) conn->sk = NULL lock_sock(sk) release_sock(sk) iso_sock_kill(sk) UAF on sk deref Fix possible UAF by holding sk refcount in iso_conn_ready(). Also recheck after lock_sock that the socket is still valid. Adjust locking so conn->sk is cleared only under lock_sock.

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 patch: 7.1.8; 27c24fda62b601d6f9ca5e992502578c4310876f <1308d72903d792d10b82bc4ef08b8a4452308b04; 5.15; patch: 0; 27c24fda62b601d6f9ca5e992502578c4310876f <0d255e63fcf3f13a570d7ac11678fa1164ac015c; patch: 6.18.44; patch: 7.2; 27c24fda62b601d6f9ca5e992502578c4310876f <4e9b5e8669b3602a4e01b6d1e9539b72e42c84d5

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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