{"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":"none","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"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.844Z","epss":0.00198,"epssPercentile":0.09869,"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.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}