Bug 2525453 (CVE-2026-80721) - CVE-2026-80721 kernel: Bluetooth: ISO: ensure no dangling hcon references in iso_conn
Summary: CVE-2026-80721 kernel: Bluetooth: ISO: ensure no dangling hcon references in ...
Keywords:
Status: NEW
Alias: CVE-2026-80721
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: 2026-08-28 07:45 UTC by OSIDB Bzimport
Modified: 2026-09-03 15:51 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-28 07:45:44 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: ensure no dangling hcon references in iso_conn

After iso_conn_del(), ISO sockets should not dereference the hcon any
more.  Currently, clearing iso_conn::hcon relies on iso_conn_del()
releasing the last reference to the iso_conn.

Simplify this by explicitly clearing conn->hcon in iso_conn_del(), to
avoid more complex reasoning on races about who holds the last
reference.
Comment 1 gkamathe 2026-09-01 11:37:16 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082811-CVE-2026-80721-72a6@gregkh/T
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