{"id":"CVE-2026-98456","title":"kernel: Bluetooth: mgmt: fix race in read_unconf_index_list() (CVE-2026-98456)","summary":"A flaw was found in the Linux kernel's Bluetooth subsystem. A race condition in the read_unconf_index_list() function allows a local user to cause an out-of-bounds write during asynchronous controller setup. This issue occurs when device s…","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-787","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:23:11+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98456.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98456.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98456"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554865"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98456"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98456"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98456.mbox"},{"url":"https://git.kernel.org/stable/c/524e0450dd9a396f99a81b045219b0e2ea0dab57"},{"url":"https://git.kernel.org/stable/c/8ddf962c76432a10a6cb80042875cbc48a9c056b"},{"url":"https://git.kernel.org/stable/c/416546cd6a54e9b68f2b91bc680b1ee17dcd77a1"},{"url":"https://git.kernel.org/stable/c/2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1"},{"url":"https://git.kernel.org/stable/c/b5dbb41b212c50c095a4dbee3017a84fe94f033b"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00126,"epssPercentile":0.02265,"scores":{"vendor":4.1,"cna":7},"ingestedAt":"2026-10-18T15:45:12.303Z","slug":"CVE-2026-98456","body":"## Overview\n\nA flaw was found in the Linux kernel's Bluetooth subsystem. A race condition in the read_unconf_index_list() function allows a local user to cause an out-of-bounds write during asynchronous controller setup. This issue occurs when device state flags change between response buffer sizing and data population. A local attacker can exploit this vulnerability to cause memory corruption, resulting in a system crash and Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98456.json)\n\n**kernel: Bluetooth: mgmt: fix race in read_unconf_index_list()** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229545,"id":"CVE-2026-98456","ts":1793019839765,"field":"cvss","old":"7","new":"4.1"},{"seq":229544,"id":"CVE-2026-98456","ts":1793019839765,"field":"severity","old":"high","new":"medium"},{"seq":228970,"id":"CVE-2026-98456","ts":1792854125063,"field":"cvss","old":null,"new":"7"},{"seq":228969,"id":"CVE-2026-98456","ts":1792854125063,"field":"severity","old":"none","new":"high"}]}