{"id":"CVE-2026-53073","state":"PUBLISHED","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.","publishedAt":"2026-06-24T16:30:14.463Z","updatedAt":"2026-06-24T16:30:14.463Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a40f94f7caa8d3421b64f63ac31bc0f24c890f39","status":"affected","lessThan":"ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07","versionType":"git"},{"version":"9e5a0f5777162e503400c70c6ed25fbbe2d38799","status":"affected","lessThan":"ed4033fb85ccaaf6c3983be3c7b037e48253d232","versionType":"git"},{"version":"80f14e9de6a43a0bd8194cad1003a3e6dcbc3984","status":"affected","lessThan":"356dee1bcac4d0d9152390561fa63331ebff211b","versionType":"git"},{"version":"02e1bcdfdf769974e7e9fa285e295cd9852e2a38","status":"affected","lessThan":"a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40","versionType":"git"},{"version":"281782d2c6730241e300d630bb9f200d831ede71","status":"affected","lessThan":"f4b69c35813c432973d340d3600c01de106ed474","versionType":"git"},{"version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","status":"affected","lessThan":"3daa5818e473ed60eb69d8b5c71b651909d28c5a","versionType":"git"},{"version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","status":"affected","lessThan":"194f029a4d7f739e44ebc1f473120187b4de5104","versionType":"git"},{"version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","status":"affected","lessThan":"68d39ea5e0adc9ecaea1ce8abd842ec972eb8718","versionType":"git"},{"version":"1dcf08fcff5ca529de6dc0395091f28854f4e54a","status":"affected","versionType":"git"},{"version":"8e5aff600539e5faea294d9612cca50220e602b8","status":"affected","versionType":"git"},{"version":"db7509fa110dd9b11134b75894677f30353b2c51","status":"affected","versionType":"git"},{"version":"5.10.237","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.181","status":"affected","lessThan":"5.15.209","versionType":"semver"},{"version":"6.1.135","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.88","status":"affected","lessThan":"6.6.141","versionType":"semver"},{"version":"6.12.24","status":"affected","lessThan":"6.12.91","versionType":"semver"},{"version":"5.4.293","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.13.12","status":"affected","lessThan":"6.14","versionType":"semver"},{"version":"6.14.3","status":"affected","lessThan":"6.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/hci_ldisc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/hci_ldisc.c"]}],"references":["https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07","https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232","https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b","https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40","https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474","https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a","https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104","https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53073.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53073","state":"PUBLISHED","datePublished":"2026-06-24T16:30:14.463Z","dateUpdated":"2026-06-24T16:30:14.463Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.383Z"},"containers":{"cna":{"title":"Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a40f94f7caa8d3421b64f63ac31bc0f24c890f39","status":"affected","lessThan":"ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07","versionType":"git"},{"version":"9e5a0f5777162e503400c70c6ed25fbbe2d38799","status":"affected","lessThan":"ed4033fb85ccaaf6c3983be3c7b037e48253d232","versionType":"git"},{"version":"80f14e9de6a43a0bd8194cad1003a3e6dcbc3984","status":"affected","lessThan":"356dee1bcac4d0d9152390561fa63331ebff211b","versionType":"git"},{"version":"02e1bcdfdf769974e7e9fa285e295cd9852e2a38","status":"affected","lessThan":"a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40","versionType":"git"},{"version":"281782d2c6730241e300d630bb9f200d831ede71","status":"affected","lessThan":"f4b69c35813c432973d340d3600c01de106ed474","versionType":"git"},{"version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","status":"affected","lessThan":"3daa5818e473ed60eb69d8b5c71b651909d28c5a","versionType":"git"},{"version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","status":"affected","lessThan":"194f029a4d7f739e44ebc1f473120187b4de5104","versionType":"git"},{"version":"5df5dafc171b90d0b8d51547a82657cd5a1986c7","status":"affected","lessThan":"68d39ea5e0adc9ecaea1ce8abd842ec972eb8718","versionType":"git"},{"version":"1dcf08fcff5ca529de6dc0395091f28854f4e54a","status":"affected","versionType":"git"},{"version":"8e5aff600539e5faea294d9612cca50220e602b8","status":"affected","versionType":"git"},{"version":"db7509fa110dd9b11134b75894677f30353b2c51","status":"affected","versionType":"git"},{"version":"5.10.237","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.181","status":"affected","lessThan":"5.15.209","versionType":"semver"},{"version":"6.1.135","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.88","status":"affected","lessThan":"6.6.141","versionType":"semver"},{"version":"6.12.24","status":"affected","lessThan":"6.12.91","versionType":"semver"},{"version":"5.4.293","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.13.12","status":"affected","lessThan":"6.14","versionType":"semver"},{"version":"6.14.3","status":"affected","lessThan":"6.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/hci_ldisc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/hci_ldisc.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-24T16:30:14.463Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.237","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.181","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.135","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.88","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","ver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