{"id":"CVE-2026-99014","summary":"Bluetooth: hci_sync: Fix command skb lifetime during scan setup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix command skb lifetime during scan setup\n\nDuring PA sync scan setup, hci_le_set_ext_scan_param_sync() gets the\naddress used for the PA_LINK lookup from hci_sent_cmd_data(). The\nreturned pointer borrows storage from sent_cmd or req_skb, without\nholding a reference to either skb.\n\nThe scan worker runs on req_workqueue while hci_cmd_work() runs on the\nseparate device workqueue. After the scan worker loads sent_cmd, the\ncommand worker can free and replace it before hci_sent_cmd_data()\ndereferences the skb. The command payload can also be freed between\nreturning from the helper and comparing the address. The connection\nlookup's RCU critical section does not protect the command skb.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in hci_sent_cmd_data+0x27c/0x2f0\n  Workqueue: hci0 hci_cmd_sync_work\n  Call Trace:\n   hci_sent_cmd_data+0x27c/0x2f0\n   hci_le_set_scan_param_sync+0x43a/0x850\n   hci_passive_scan_sync+0xb09/0x1460\n   hci_update_passive_scan_sync+0x47c/0x6e0\n   hci_le_pa_create_sync+0x200/0xa70\n   hci_cmd_sync_work+0x13c/0x290\n\n  Allocated by task 95:\n   skb_clone+0x13f/0x340\n   hci_cmd_work+0x2a9/0x7e0\n\n  Freed by task 95:\n   kmem_cache_free+0xba/0x3a0\n   hci_cmd_work+0x29c/0x7e0\n\nUse hdev-\u003elock to serialize the address snapshot with sent_cmd\nreplacement. Protect req_skb replacement and completion cleanup with\nthe same lock because the helper falls back to that skb. Copy the\naddress before releasing the lock and use the copy for the existing\nRCU-protected connection lookup. Release the mutex before sending or\nwaiting for commands, preserving the lookup and completion ordering.","modified":"2026-10-28T02:30:32.634130350Z","published":"2026-10-23T12:20:39.617Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99014.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f01cbddfb4273fcc9a786d13b0a2525029023605"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99014.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99014"},{"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":"de3c85d321bfb85b7742a6cfab95d680da3e26b1"},{"fixed":"f01cbddfb4273fcc9a786d13b0a2525029023605"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"22cbf4f84c00da64196eb15034feee868e63eef0"},{"fixed":"119ba8070b3f112dd36c897f4f70ea5bb7d370b8"},{"fixed":"7db33b36213a3a1a40940c009ddac30670b55922"},{"fixed":"762850c203fab1190ad6a3de41cd51920b22236d"},{"fixed":"9af12272061d206af8bc3e40215cb694421ab73a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.28"},{"fixed":"6.6.160"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.8.7"},{"fixed":"6.9"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7a54f8314584f78fb0557153b1059924249ef628"}]}],"versions":["v6.6.159","v6.6.158","v6.6.157","v6.6.156","v6.6.155","v6.6.154","v6.6.153","v6.6.152","v6.6.151","v6.6.150","v6.6.149","v6.6.148","v6.6.147","v6.6.146","v6.6.145","v6.6.144","v6.6.143","v6.6.142","v6.6.141","v6.6.140","v6.6.139","v6.6.138","v6.6.137","v6.6.136","v6.6.135","v6.6.134","v6.6.133","v6.6.132","v6.6.131","v6.6.130","v6.6.129","v6.6.128","v6.6.127","v6.6.126","v6.6.125","v6.6.124","v6.6.123","v6.6.122","v6.6.121","v6.6.120","v6.6.119","v6.6.118","v6.6.117","v6.6.116","v6.6.115","v6.6.114","v6.6.113","v6.6.112","v6.6.111","v6.6.110","v6.6.109","v6.6.108","v6.6.107","v6.6.106","v6.6.105","v6.6.104","v6.6.103","v6.6.102","v6.6.101","v6.6.100","v6.6.99","v6.6.98","v6.6.97","v6.6.96","v6.6.95","v6.6.94","v6.6.93","v6.6.92","v6.6.91","v6.6.90","v6.6.89","v6.6.88","v6.6.87","v6.6.86","v6.6.85","v6.6.84","v6.6.83","v6.6.82","v6.6.81","v6.6.80","v6.6.79","v6.6.78","v6.6.77","v6.6.76","v6.6.75","v6.6.74","v6.6.73","v6.6.72","v6.6.71","v6.6.70","v6.6.69","v6.6.68","v6.6.67","v6.6.66","v6.6.65","v6.6.64","v6.6.63","v6.6.62","v6.6.61","v6.6.60","v6.6.59","v6.6.58","v6.6.57","v6.6.56","v6.6.55","v6.6.54","v6.6.53","v6.6.52","v6.6.51","v6.6.50","v6.6.49","v6.6.48","v6.6.47","v6.6.46","v6.6.45","v6.6.44","v6.6.43","v6.6.42","v6.6.41","v6.6.40","v6.6.39","v6.6.38","v6.6.37","v6.6.36","v6.6.35","v6.6.34","v6.6.33","v6.6.32","v6.6.31","v6.6.30","v6.6.29","v6.6.28","v6.8.12","v6.8.11","v6.8.10","v6.8.9","v6.8.8","v6.8.7"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99014.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.114"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.18.57"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"7.2.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99014.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"}]}