{"id":"CVE-2026-43018","title":"Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_le_remote_conn_param_r…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 59eecf0ffde15670e6a5e10c47be67f73d843b20","Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81","Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 7cadb03be37e761130edb153544fe0770a842b19","Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 1d0bdbfe3e91c11f0a704c52443a9446a10d699c","Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < ea3cd36d7382d5f8309df04c275d20df139ed42c","Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < b255531b27da336571411248c2a72a350662bd09","Linux 5.17"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:13:31.348841Z"},"published":"2026-05-01","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:20:28.047Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43018","references":[{"url":"https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20"},{"url":"https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81"},{"url":"https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19"},{"url":"https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c"},{"url":"https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c"},{"url":"https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09"}],"tags":["cve.org"],"epss":0.00403,"epssPercentile":0.32955,"ingestedAt":"2026-10-16T17:24:46.676Z","slug":"CVE-2026-43018","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_le_remote_conn_param_req_evt, otherwise it's possible it is freed\nconcurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage.\n\n## Affected\n\n- `Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 59eecf0ffde15670e6a5e10c47be67f73d843b20`\n- `Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81`\n- `Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 7cadb03be37e761130edb153544fe0770a842b19`\n- `Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < 1d0bdbfe3e91c11f0a704c52443a9446a10d699c`\n- `Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < ea3cd36d7382d5f8309df04c275d20df139ed42c`\n- `Linux >= 95118dd4edfec950898a00180c6f998df0a6406d < b255531b27da336571411248c2a72a350662bd09`\n- `Linux 5.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}