{"api_version":"1","generated_at":"2026-06-27T08:28:35+00:00","cve":"CVE-2026-53073","urls":{"html":"https://cve.report/CVE-2026-53073","api":"https://cve.report/api/cve/CVE-2026-53073.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53073","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53073"},"summary":{"title":"Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error\n\nWhen hci_register_dev() fails in hci_uart_register_dev()\nHCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu)\nand setting hu->hdev to NULL. This means incoming UART data will reach\nthe protocol-specific recv handler in hci_uart_tty_receive() after\nresources are freed.\n\nClear HCI_UART_PROTO_INIT with a write lock before calling\nhu->proto->close() and setting hu->hdev to NULL. The write lock ensures\nall active readers have completed and no new reader can enter the\nprotocol recv path before resources are freed.\n\nThis allows the protocol-specific recv functions to remove the\n\"HCI_UART_REGISTERED\" guard without risking a null pointer dereference\nif hci_register_dev() fails.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:21","updated_at":"2026-06-24 17:17:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a","name":"https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104","name":"https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b","name":"https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718","name":"https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40","name":"https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232","name":"https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07","name":"https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474","name":"https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53073","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53073","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a40f94f7caa8d3421b64f63ac31bc0f24c890f39 ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9e5a0f5777162e503400c70c6ed25fbbe2d38799 ed4033fb85ccaaf6c3983be3c7b037e48253d232 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 80f14e9de6a43a0bd8194cad1003a3e6dcbc3984 356dee1bcac4d0d9152390561fa63331ebff211b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02e1bcdfdf769974e7e9fa285e295cd9852e2a38 a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 281782d2c6730241e300d630bb9f200d831ede71 f4b69c35813c432973d340d3600c01de106ed474 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5df5dafc171b90d0b8d51547a82657cd5a1986c7 3daa5818e473ed60eb69d8b5c71b651909d28c5a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5df5dafc171b90d0b8d51547a82657cd5a1986c7 194f029a4d7f739e44ebc1f473120187b4de5104 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5df5dafc171b90d0b8d51547a82657cd5a1986c7 68d39ea5e0adc9ecaea1ce8abd842ec972eb8718 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dcf08fcff5ca529de6dc0395091f28854f4e54a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8e5aff600539e5faea294d9612cca50220e602b8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db7509fa110dd9b11134b75894677f30353b2c51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.237 5.10.258 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.181 5.15.209 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.135 6.1.175 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.88 6.6.141 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.24 6.12.91 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.293 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.13.12 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14.3 6.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.258 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.209 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.141 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.91 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.33 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.10 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53073","cve":"CVE-2026-53073","epss":"0.001720000","percentile":"0.068050000","score_date":"2026-06-26","updated_at":"2026-06-27 00:07:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/bluetooth/hci_ldisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07","status":"affected","version":"a40f94f7caa8d3421b64f63ac31bc0f24c890f39","versionType":"git"},{"lessThan":"ed4033fb85ccaaf6c3983be3c7b037e48253d232","status":"affected","version":"9e5a0f5777162e503400c70c6ed25fbbe2d38799","versionType":"git"},{"lessThan":"356dee1bcac4d0d9152390561fa63331ebff211b","status":"affected","version":"80f14e9de6a43a0bd8194cad1003a3e6dcbc3984","versionType":"git"},{"lessThan":"a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40","status":"affected","version":"02e1bcdfdf769974e7e9fa285e295cd9852e2a38","versionType":"git"},{"lessThan":"f4b69c35813c432973d340d3600c01de106ed474","status":"affected","version":"281782d2c6730241e300d630bb9f200d831ede71","versionType":"git"},{"lessThan":"3daa5818e473ed60eb69d8b5c71b651909d28c5a","status":"affected","version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","versionType":"git"},{"lessThan":"194f029a4d7f739e44ebc1f473120187b4de5104","status":"affected","version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","versionType":"git"},{"lessThan":"68d39ea5e0adc9ecaea1ce8abd842ec972eb8718","status":"affected","version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","versionType":"git"},{"status":"affected","version":"1dcf08fcff5ca529de6dc0395091f28854f4e54a","versionType":"git"},{"status":"affected","version":"8e5aff600539e5faea294d9612cca50220e602b8","versionType":"git"},{"status":"affected","version":"db7509fa110dd9b11134b75894677f30353b2c51","versionType":"git"},{"lessThan":"5.10.258","status":"affected","version":"5.10.237","versionType":"semver"},{"lessThan":"5.15.209","status":"affected","version":"5.15.181","versionType":"semver"},{"lessThan":"6.1.175","status":"affected","version":"6.1.135","versionType":"semver"},{"lessThan":"6.6.141","status":"affected","version":"6.6.88","versionType":"semver"},{"lessThan":"6.12.91","status":"affected","version":"6.12.24","versionType":"semver"},{"lessThan":"5.5","status":"affected","version":"5.4.293","versionType":"semver"},{"lessThan":"6.14","status":"affected","version":"6.13.12","versionType":"semver"},{"lessThan":"6.15","status":"affected","version":"6.14.3","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/bluetooth/hci_ldisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.141","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.258","versionStartIncluding":"5.10.237","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.209","versionStartIncluding":"5.15.181","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"6.1.135","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.141","versionStartIncluding":"6.6.88","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.91","versionStartIncluding":"6.12.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.33","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.10","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.293","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error\n\nWhen hci_register_dev() fails in hci_uart_register_dev()\nHCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu)\nand setting hu->hdev to NULL. This means incoming UART data will reach\nthe protocol-specific recv handler in hci_uart_tty_receive() after\nresources are freed.\n\nClear HCI_UART_PROTO_INIT with a write lock before calling\nhu->proto->close() and setting hu->hdev to NULL. The write lock ensures\nall active readers have completed and no new reader can enter the\nprotocol recv path before resources are freed.\n\nThis allows the protocol-specific recv functions to remove the\n\"HCI_UART_REGISTERED\" guard without risking a null pointer dereference\nif hci_register_dev() fails."}],"providerMetadata":{"dateUpdated":"2026-06-24T16:30:14.463Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07"},{"url":"https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232"},{"url":"https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b"},{"url":"https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40"},{"url":"https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474"},{"url":"https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a"},{"url":"https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104"},{"url":"https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718"}],"title":"Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53073","datePublished":"2026-06-24T16:30:14.463Z","dateReserved":"2026-06-09T07:44:35.383Z","dateUpdated":"2026-06-24T16:30:14.463Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 17:17:21","lastModifiedDate":"2026-06-24 17:17:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53073","Ordinal":"1","Title":"Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error","CVE":"CVE-2026-53073","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53073","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error\n\nWhen hci_register_dev() fails in hci_uart_register_dev()\nHCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu)\nand setting hu->hdev to NULL. This means incoming UART data will reach\nthe protocol-specific recv handler in hci_uart_tty_receive() after\nresources are freed.\n\nClear HCI_UART_PROTO_INIT with a write lock before calling\nhu->proto->close() and setting hu->hdev to NULL. The write lock ensures\nall active readers have completed and no new reader can enter the\nprotocol recv path before resources are freed.\n\nThis allows the protocol-specific recv functions to remove the\n\"HCI_UART_REGISTERED\" guard without risking a null pointer dereference\nif hci_register_dev() fails.","Type":"Description","Title":"Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error"}]}}}