Bug 2517078 (CVE-2026-74538) - CVE-2026-74538 kernel: Bluetooth: ISO: lock sk in iso_connect_ind
Summary: CVE-2026-74538 kernel: Bluetooth: ISO: lock sk in iso_connect_ind
Keywords:
Status: NEW
Alias: CVE-2026-74538
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 12:48 UTC by OSIDB Bzimport
Modified: 2026-08-17 13:11 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-08-15 12:48:33 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: lock sk in iso_connect_ind

Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the
"ev3" part of iso_connect_ind.  It may also be NULL if socket has
transitioned away from the LISTEN/CONNECT states before locking.

Fix by adding lock/release. Recheck hcon is valid after lock acquire
where needed.
Comment 1 TEJ RATHI 2026-08-17 13:04:41 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081548-CVE-2026-74538-85c1@gregkh/T
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