{"id":"CVE-2026-80721","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: ensure no dangling hcon references in iso_conn\n\nAfter iso_conn_del(), ISO sockets should not dereference the hcon any\nmore","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: ensure no dangling hcon references in iso_conn\n\nAfter iso_conn_del(), ISO sockets should not dereference the hcon any\nmore.  Currently, clearing iso_con…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","published":"2026-08-28","updated":"2026-08-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80721","references":[{"url":"https://git.kernel.org/stable/c/aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cdce8af9291d8a1f8916c271de029bf558d9e8ec","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e941799c31f68e67ce0976efb38a79101f921b64","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00375,"epssPercentile":0.28746,"ingestedAt":"2026-08-30T07:49:06.270Z","slug":"CVE-2026-80721","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: ensure no dangling hcon references in iso_conn\n\nAfter iso_conn_del(), ISO sockets should not dereference the hcon any\nmore.  Currently, clearing iso_conn::hcon relies on iso_conn_del()\nreleasing the last reference to the iso_conn.\n\nSimplify this by explicitly clearing conn->hcon in iso_conn_del(), to\navoid more complex reasoning on races about who holds the last\nreference.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}