Linux Kernel Bluetooth ISO: Dangling hcon Ref in iso_conn Del
CVE-2026-80721 Published on August 28, 2026
Bluetooth: ISO: ensure no dangling hcon references in iso_conn
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.
Products Associated with CVE-2026-80721
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below e941799c31f68e67ce0976efb38a79101f921b64 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below cdce8af9291d8a1f8916c271de029bf558d9e8ec is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb is affected.
- Before 6.18.44 is affected.
- Before 7.1.8 is affected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.