{"id":"CVE-2026-98462","title":"kernel: Bluetooth: hci_conn: fix CIS hold ownership on reuse (CVE-2026-98462)","summary":"A flaw was found in the Linux kernel's Bluetooth subsystem. Improper reference count management during the reuse and binding of Connected Isochronous Stream (CIS) connections can result in an unbalanced connection hold count. A local attac…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-416","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-21","sourceUpdated":"2026-10-21T02:12:38+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98462.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98462.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98462"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554855"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98462"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98462"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98462.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-98462"},{"url":"https://git.kernel.org/stable/c/10f959cb435217b4b407864e5be0eb779e389490"},{"url":"https://git.kernel.org/stable/c/072bc8659f22566083f8eef7dc5903bbcaf7804a"},{"url":"https://git.kernel.org/stable/c/3ff5a8d949e3a2a435d0a5ee05074cd371b0158a"},{"url":"https://git.kernel.org/stable/c/947eb2f41f70d371eb16897ee4e8e32bff73b476"},{"url":"https://git.kernel.org/stable/c/e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00206,"epssPercentile":0.10483,"ingestedAt":"2026-10-18T15:45:12.302Z","slug":"CVE-2026-98462","body":"## Overview\n\nA flaw was found in the Linux kernel's Bluetooth subsystem. Improper reference count management during the reuse and binding of Connected Isochronous Stream (CIS) connections can result in an unbalanced connection hold count. A local attacker could exploit this flaw by triggering specific connection setup and error paths, potentially leading to memory corruption or a denial of service (system crash).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98462.json)\n\n**kernel: Bluetooth: hci_conn: fix CIS hold ownership on reuse** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-21.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227092,"id":"CVE-2026-98462","ts":1792585126084,"field":"cvss","old":null,"new":"4.7"},{"seq":227091,"id":"CVE-2026-98462","ts":1792585126084,"field":"severity","old":"none","new":"medium"}]}