{"id":"CVE-2026-43019","summary":"Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix potential UAF in set_cig_params_sync\n\nhci_conn lookup and field access must be covered by hdev lock in\nset_cig_params_sync, otherwise it's possible it is freed concurrently.\n\nTake hdev lock to prevent hci_conn from being deleted or modified\nconcurrently.  Just RCU lock is not suitable here, as we also want to\navoid \"tearing\" in the configuration.","modified":"2026-10-28T02:30:46.080105929Z","published":"2026-05-01T14:15:23.035Z","related":["SUSE-SU-2026:22809-1","SUSE-SU-2026:22810-1","SUSE-SU-2026:22903-1","SUSE-SU-2026:22904-1","SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:3130-1","SUSE-SU-2026:3166-1","openSUSE-SU-2026:21555-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43019.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7502c1cf303b69f71d085f5ff7251b0e1b0f09df"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43019.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43019"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a091289218202bc09d9b9caa8afcde1018584aec"},{"fixed":"7502c1cf303b69f71d085f5ff7251b0e1b0f09df"},{"fixed":"66d432e9b45bae7881ffcdb12cd8fd0bf254ef02"},{"fixed":"7d568fede8eac91161a60b710aa920abe9b0fb9f"},{"fixed":"bad65b4b0a96139f023eadc28a33125963208449"},{"fixed":"a2639a7f0f5bf7d73f337f8f077c19415c62ed2c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.4.16"},{"fixed":"6.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.5.3"},{"fixed":"6.6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3a273cd0f47dd672d37736e623849374f9ab9ce9"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062"}]}],"versions":["v6.4.16","v6.5.13","v6.5.12","v6.5.11","v6.5.10","v6.5.9","v6.5.8","v6.5.7","v6.5.6","v6.5.5","v6.5.4","v6.5.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43019.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.81"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.22"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43019.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}