{"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","cwe":["CWE-911"],"vendor":"Linux","product":"Linux","affected":["Linux >= dc26097bdb864a0d5955b9a25e43376ffc1af99b < e941799c31f68e67ce0976efb38a79101f921b64","Linux >= dc26097bdb864a0d5955b9a25e43376ffc1af99b < cdce8af9291d8a1f8916c271de029bf558d9e8ec","Linux >= dc26097bdb864a0d5955b9a25e43376ffc1af99b < aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb","Linux f53e7489273dc2bb307bf50f319b3762d45534f0","Linux a58d0f5dac322e16cc75334d000666512341bde5","Linux >= 6.11.11 < 6.12","Linux >= 6.12.2 < 6.13","Linux 6.13"],"published":"2026-08-28","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:18:08.613","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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80721.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80721"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2525453"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80721"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80721"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082811-CVE-2026-80721-72a6@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00375,"epssPercentile":0.31297,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:20:54.409613Z"},"scores":{"nvd":8.8,"vendor":5.5},"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.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80721.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}