{"api_version":"1","generated_at":"2026-10-27T07:57:49+00:00","cve":"CVE-2026-99014","urls":{"html":"https://cve.report/CVE-2026-99014","api":"https://cve.report/api/cve/CVE-2026-99014.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99014","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99014"},"summary":{"title":"Bluetooth: hci_sync: Fix command skb lifetime during scan setup","description":"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->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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-23 13:17:24","updated_at":"2026-10-24 14:16:52"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8","name":"https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d","name":"https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922","name":"https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a","name":"https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f01cbddfb4273fcc9a786d13b0a2525029023605","name":"https://git.kernel.org/stable/c/f01cbddfb4273fcc9a786d13b0a2525029023605","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99014","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99014","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected de3c85d321bfb85b7742a6cfab95d680da3e26b1 f01cbddfb4273fcc9a786d13b0a2525029023605 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 22cbf4f84c00da64196eb15034feee868e63eef0 119ba8070b3f112dd36c897f4f70ea5bb7d370b8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 22cbf4f84c00da64196eb15034feee868e63eef0 7db33b36213a3a1a40940c009ddac30670b55922 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 22cbf4f84c00da64196eb15034feee868e63eef0 762850c203fab1190ad6a3de41cd51920b22236d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 22cbf4f84c00da64196eb15034feee868e63eef0 9af12272061d206af8bc3e40215cb694421ab73a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7a54f8314584f78fb0557153b1059924249ef628 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.28 6.6.160 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8.7 6.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.9","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.114 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.57 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.11 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/hci_core.c","net/bluetooth/hci_sync.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f01cbddfb4273fcc9a786d13b0a2525029023605","status":"affected","version":"de3c85d321bfb85b7742a6cfab95d680da3e26b1","versionType":"git"},{"lessThan":"119ba8070b3f112dd36c897f4f70ea5bb7d370b8","status":"affected","version":"22cbf4f84c00da64196eb15034feee868e63eef0","versionType":"git"},{"lessThan":"7db33b36213a3a1a40940c009ddac30670b55922","status":"affected","version":"22cbf4f84c00da64196eb15034feee868e63eef0","versionType":"git"},{"lessThan":"762850c203fab1190ad6a3de41cd51920b22236d","status":"affected","version":"22cbf4f84c00da64196eb15034feee868e63eef0","versionType":"git"},{"lessThan":"9af12272061d206af8bc3e40215cb694421ab73a","status":"affected","version":"22cbf4f84c00da64196eb15034feee868e63eef0","versionType":"git"},{"status":"affected","version":"7a54f8314584f78fb0557153b1059924249ef628","versionType":"git"},{"lessThan":"6.6.160","status":"affected","version":"6.6.28","versionType":"semver"},{"lessThan":"6.9","status":"affected","version":"6.8.7","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/hci_core.c","net/bluetooth/hci_sync.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.9"},{"lessThan":"6.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.114","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.57","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"6.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.114","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.57","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.11","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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->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."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - A local listen(2) on a broadcast BTPROTO_ISO socket reaches iso_sock_listen() → iso_listen_bis() → hci_pa_create_sync() → hci_le_pa_create_sync() → hci_le_set_ext_scan_param_sync(). No received Bluetooth PDU initiates this PA-sync setup.\nAC:L - The attacker can run the ISO listen while flooding security-filter-permitted HCI_OP_READ_LOCAL_VERSION commands through a raw HCI socket; hci_sock_sendmsg() queues them on hdev->cmd_q, making hci_cmd_work() race hci_sent_cmd_data() on the separate req_workqueue.\nPR:L - iso_sock_create(), bind(), and listen() have no capability check, while an unprivileged raw HCI socket may submit HCI_OP_READ_LOCAL_VERSION because OGF_INFO_PARAM/OCF 1 is in hci_sec_filter. Bluetooth sockets require init_net, but an ordinary host user satisfies that condition.\nUI:N - The attacking process itself binds and listens on the broadcast ISO socket and submits the racing raw HCI commands; no separate victim action is needed once ISO sockets and the adapter are enabled.\nS:U - The stale sent_cmd or req_skb and resulting memory access remain within the host kernel's Bluetooth authority; hci_le_set_ext_scan_param_sync() crosses no VM, IOMMU, or other security boundary.\nC:H - hci_cmd_data() dereferences len and data from a freed sk_buff, and the returned command-payload pointer can itself be freed before the six-byte bdaddr read. Reclaiming the sprayable skbuff_head_cache object therefore supplies an attacker-directed stale-pointer read primitive.\nI:H - A reclaimed command sk_buff controls the stale len/data fields and the bdaddr used to select a PA_LINK, whose iso_qos then determines the HCI_OP_LE_SET_EXT_SCAN_PARAMS command. This sprayable kernel use-after-free is an integrity-high memory-corruption primitive.\nA:H - KASAN confirmed a slab-use-after-free in hci_sent_cmd_data(); dereferencing the freed sk_buff or its released payload can fault in hci_cmd_sync_work and cause a kernel oops or panic."}]}],"providerMetadata":{"dateUpdated":"2026-10-24T14:10:02.640Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"Bluetooth: hci_sync: Fix command skb lifetime during scan setup","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99014","datePublished":"2026-10-23T12:20:39.617Z","dateReserved":"2026-09-25T10:25:14.385Z","dateUpdated":"2026-10-24T14:10:02.640Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-23 13:17:24","lastModifiedDate":"2026-10-24 14:16:52","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99014","Ordinal":"1","Title":"Bluetooth: hci_sync: Fix command skb lifetime during scan setup","CVE":"CVE-2026-99014","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99014","Ordinal":"1","NoteData":"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->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.","Type":"Description","Title":"Bluetooth: hci_sync: Fix command skb lifetime during scan setup"}]}}}