{"api_version":"1","generated_at":"2026-09-18T01:06:21+00:00","cve":"CVE-2026-90255","urls":{"html":"https://cve.report/CVE-2026-90255","api":"https://cve.report/api/cve/CVE-2026-90255.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90255","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90255"},"summary":{"title":"Bluetooth: hci_conn: fix the SCO setup context lifetime","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix the SCO setup context lifetime\n\nhci_setup_sync() queues a conn_handle_t with a NULL destroy callback, so\nthe context is only freed if hci_enhanced_setup_sync() actually runs. An\nentry that is cancelled instead is leaked, as\n_hci_cmd_sync_cancel_entry() does not release entry->data when there is\nno destroy callback, and hci_cmd_sync_clear() cancels every pending entry\nwhen the controller is unregistered.\n\nThe context also stores a bare hci_conn pointer, so the connection can be\nfreed while the work is queued. The dequeue in hci_conn_del() does not\ncover it either, as it matches on entry->data == conn and entry->data is\nthe wrapper here. Same problem as commit 2f5d635ad590 (\"Bluetooth:\nhci_sync: hold conn in hci_connect_acl/le_sync() callbacks\").\n\nHold the connection and release both from a destroy callback. The\nsubmission failure path drops both, since hci_cmd_sync_submit() does not\ncall the destroy callback when it fails to queue.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:21","updated_at":"2026-09-17 17:17:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/42de40abe25db9211107af8896d0fd741f10648d","name":"https://git.kernel.org/stable/c/42de40abe25db9211107af8896d0fd741f10648d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4d7b1c834d2775b73c65e4888e01f5af8b477fe9","name":"https://git.kernel.org/stable/c/4d7b1c834d2775b73c65e4888e01f5af8b477fe9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c1fe3c74a89a7749cba3caa0dd91236049c66116","name":"https://git.kernel.org/stable/c/c1fe3c74a89a7749cba3caa0dd91236049c66116","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/37cfec41365c826d5496ef5d00c9e215eee53aa2","name":"https://git.kernel.org/stable/c/37cfec41365c826d5496ef5d00c9e215eee53aa2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27","name":"https://git.kernel.org/stable/c/9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a661de0ee29d0915c5e924edf91d2be2b4d35bae","name":"https://git.kernel.org/stable/c/a661de0ee29d0915c5e924edf91d2be2b4d35bae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90255","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90255","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 37cfec41365c826d5496ef5d00c9e215eee53aa2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 a661de0ee29d0915c5e924edf91d2be2b4d35bae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 c1fe3c74a89a7749cba3caa0dd91236049c66116 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 4d7b1c834d2775b73c65e4888e01f5af8b477fe9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 42de40abe25db9211107af8896d0fd741f10648d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * 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_conn.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"37cfec41365c826d5496ef5d00c9e215eee53aa2","status":"affected","version":"e07a06b4eb417f5271d33ce2240e93c62d98b7b4","versionType":"git"},{"lessThan":"9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27","status":"affected","version":"e07a06b4eb417f5271d33ce2240e93c62d98b7b4","versionType":"git"},{"lessThan":"a661de0ee29d0915c5e924edf91d2be2b4d35bae","status":"affected","version":"e07a06b4eb417f5271d33ce2240e93c62d98b7b4","versionType":"git"},{"lessThan":"c1fe3c74a89a7749cba3caa0dd91236049c66116","status":"affected","version":"e07a06b4eb417f5271d33ce2240e93c62d98b7b4","versionType":"git"},{"lessThan":"4d7b1c834d2775b73c65e4888e01f5af8b477fe9","status":"affected","version":"e07a06b4eb417f5271d33ce2240e93c62d98b7b4","versionType":"git"},{"lessThan":"42de40abe25db9211107af8896d0fd741f10648d","status":"affected","version":"e07a06b4eb417f5271d33ce2240e93c62d98b7b4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/hci_conn.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.1"},{"lessThan":"6.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix the SCO setup context lifetime\n\nhci_setup_sync() queues a conn_handle_t with a NULL destroy callback, so\nthe context is only freed if hci_enhanced_setup_sync() actually runs. An\nentry that is cancelled instead is leaked, as\n_hci_cmd_sync_cancel_entry() does not release entry->data when there is\nno destroy callback, and hci_cmd_sync_clear() cancels every pending entry\nwhen the controller is unregistered.\n\nThe context also stores a bare hci_conn pointer, so the connection can be\nfreed while the work is queued. The dequeue in hci_conn_del() does not\ncover it either, as it matches on entry->data == conn and entry->data is\nthe wrapper here. Same problem as commit 2f5d635ad590 (\"Bluetooth:\nhci_sync: hold conn in hci_connect_acl/le_sync() callbacks\").\n\nHold the connection and release both from a destroy callback. The\nsubmission failure path drops both, since hci_cmd_sync_submit() does not\ncall the destroy callback when it fails to queue."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:07:54.775Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/37cfec41365c826d5496ef5d00c9e215eee53aa2"},{"url":"https://git.kernel.org/stable/c/9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27"},{"url":"https://git.kernel.org/stable/c/a661de0ee29d0915c5e924edf91d2be2b4d35bae"},{"url":"https://git.kernel.org/stable/c/c1fe3c74a89a7749cba3caa0dd91236049c66116"},{"url":"https://git.kernel.org/stable/c/4d7b1c834d2775b73c65e4888e01f5af8b477fe9"},{"url":"https://git.kernel.org/stable/c/42de40abe25db9211107af8896d0fd741f10648d"}],"title":"Bluetooth: hci_conn: fix the SCO setup context lifetime","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90255","datePublished":"2026-09-17T16:07:54.775Z","dateReserved":"2026-09-11T19:38:34.796Z","dateUpdated":"2026-09-17T16:07:54.775Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:21","lastModifiedDate":"2026-09-17 17:17:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90255","Ordinal":"1","Title":"Bluetooth: hci_conn: fix the SCO setup context lifetime","CVE":"CVE-2026-90255","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90255","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix the SCO setup context lifetime\n\nhci_setup_sync() queues a conn_handle_t with a NULL destroy callback, so\nthe context is only freed if hci_enhanced_setup_sync() actually runs. An\nentry that is cancelled instead is leaked, as\n_hci_cmd_sync_cancel_entry() does not release entry->data when there is\nno destroy callback, and hci_cmd_sync_clear() cancels every pending entry\nwhen the controller is unregistered.\n\nThe context also stores a bare hci_conn pointer, so the connection can be\nfreed while the work is queued. The dequeue in hci_conn_del() does not\ncover it either, as it matches on entry->data == conn and entry->data is\nthe wrapper here. Same problem as commit 2f5d635ad590 (\"Bluetooth:\nhci_sync: hold conn in hci_connect_acl/le_sync() callbacks\").\n\nHold the connection and release both from a destroy callback. The\nsubmission failure path drops both, since hci_cmd_sync_submit() does not\ncall the destroy callback when it fails to queue.","Type":"Description","Title":"Bluetooth: hci_conn: fix the SCO setup context lifetime"}]}}}