{"id":"CVE-2026-43022","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists\n\nhci_cmd_sync_queue_once() needs to indicate whether a queue item was\nadded, so caller can know …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists\n\nhci_cmd_sync_queue_once() needs to indicate whether a queue item was\nadded, so caller can know …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.9, < 6.19.12","linux_kernel = 6.1.120","linux_kernel = 6.6.51","linux_kernel = 6.8.9","linux_kernel = 7.0"],"patched":["linux_kernel 6.19.12"],"published":"2026-05-01","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:29.830","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43022","references":[{"url":"https://git.kernel.org/stable/c/0ad2ce230b38cd4b3f6732cc609e270461e626e5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2969554bcfccb5c609f6b6cd4a014933f3a66dd0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5cfa4f537a056c91ac6c09bc3ab58a4455217df7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00107,"epssPercentile":0.01099,"ingestedAt":"2026-10-15T11:00:41.712Z","slug":"CVE-2026-43022","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists\n\nhci_cmd_sync_queue_once() needs to indicate whether a queue item was\nadded, so caller can know if callbacks are called, so it can avoid\nleaking resources.\n\nChange the function to return -EEXIST if queue item already exists.\n\nModify all callsites to handle that.\n\n## Affected\n\n- `linux_kernel >= 6.9, < 6.19.12`\n- `linux_kernel = 6.1.120`\n- `linux_kernel = 6.6.51`\n- `linux_kernel = 6.8.9`\n- `linux_kernel = 7.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.12`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":222264,"id":"CVE-2026-43022","ts":1792065862637,"field":"cvss","old":null,"new":"5.5"},{"seq":222263,"id":"CVE-2026-43022","ts":1792065862637,"field":"severity","old":"none","new":"medium"}]}