{"id":"CVE-2026-90252","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: free the HCI command when it is cancelled\n\nmgmt_hci_cmd_sync() queues the pending command with a NULL destroy\ncallback, so it is only freed if send_hci…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: free the HCI command when it is cancelled\n\nmgmt_hci_cmd_sync() queues the pending command with a NULL destroy\ncallback, so it is only freed if send_hci…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 827af4787e74e8df9e8e0677a69fbb15e0856d2f < e0cd7b34dc6b5414cac3d4cd376f73d3e9ffbd93","Linux >= 827af4787e74e8df9e8e0677a69fbb15e0856d2f < 481533b03985177ddc805e0bd12fc07e7adf9040","Linux >= 827af4787e74e8df9e8e0677a69fbb15e0856d2f < 414b365ecea6c30357adee6b8a7c5edc03a03575","Linux 6.13"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:21.500","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90252","references":[{"url":"https://git.kernel.org/stable/c/414b365ecea6c30357adee6b8a7c5edc03a03575","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/481533b03985177ddc805e0bd12fc07e7adf9040","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e0cd7b34dc6b5414cac3d4cd376f73d3e9ffbd93","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90252.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90252"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536598"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90252"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90252"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90252.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.844Z","epss":0.00206,"epssPercentile":0.10609,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-772"],"slug":"CVE-2026-90252","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: free the HCI command when it is cancelled\n\nmgmt_hci_cmd_sync() queues the pending command with a NULL destroy\ncallback, so it is only freed if send_hci_cmd_sync() runs. A cancelled\nentry is leaked, as _hci_cmd_sync_cancel_entry() does not release\nentry->data when there is no destroy callback, and hci_cmd_sync_clear()\ncancels every pending entry when the controller is unregistered. Nothing\nelse reclaims it either: mgmt_pending_new() does not put the command on\nhdev->mgmt_pending.\n\nThe leak also pins the socket reference taken by mgmt_pending_new(), so\nthe mgmt socket is never released.\n\nFree the command from a destroy callback. The now-empty done label is\nreplaced by a direct return.\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** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90252.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":216320,"id":"CVE-2026-90252","ts":1791274072661,"field":"cvss","old":null,"new":"5.5"},{"seq":216319,"id":"CVE-2026-90252","ts":1791274072661,"field":"severity","old":"none","new":"medium"}]}