{"id":"CVE-2026-99014","title":"Bluetooth: hci_sync: Fix command skb lifetime during scan setup","summary":"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 looku…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= de3c85d321bfb85b7742a6cfab95d680da3e26b1 < f01cbddfb4273fcc9a786d13b0a2525029023605","Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 119ba8070b3f112dd36c897f4f70ea5bb7d370b8","Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 7db33b36213a3a1a40940c009ddac30670b55922","Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 762850c203fab1190ad6a3de41cd51920b22236d","Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 9af12272061d206af8bc3e40215cb694421ab73a","Linux 7a54f8314584f78fb0557153b1059924249ef628","Linux >= 6.6.28 < 6.6.160","Linux >= 6.8.7 < 6.9","Linux 6.9"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T12:20:39.617Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99014","references":[{"url":"https://git.kernel.org/stable/c/f01cbddfb4273fcc9a786d13b0a2525029023605"},{"url":"https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8"},{"url":"https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922"},{"url":"https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d"},{"url":"https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.540Z","slug":"CVE-2026-99014","body":"## Overview\n\nIn 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->lock 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.\n\n## Affected\n\n- `Linux >= de3c85d321bfb85b7742a6cfab95d680da3e26b1 < f01cbddfb4273fcc9a786d13b0a2525029023605`\n- `Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 119ba8070b3f112dd36c897f4f70ea5bb7d370b8`\n- `Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 7db33b36213a3a1a40940c009ddac30670b55922`\n- `Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 762850c203fab1190ad6a3de41cd51920b22236d`\n- `Linux >= 22cbf4f84c00da64196eb15034feee868e63eef0 < 9af12272061d206af8bc3e40215cb694421ab73a`\n- `Linux 7a54f8314584f78fb0557153b1059924249ef628`\n- `Linux >= 6.6.28 < 6.6.160`\n- `Linux >= 6.8.7 < 6.9`\n- `Linux 6.9`\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":[]}