CVE-2026-53073In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_IN…
Updated under an hour ago ()
Does this affect you?
It affects linux_kernel. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu) and setting hu->hdev to NULL. This means incoming UART data will reach the protocol-specific recv handler in hci_uart_tty_receive() after resources are freed. Clear HCI_UART_PROTO_INIT with a write lock before calling hu->proto->close() and setting hu->hdev to NULL. The write lock ensures all active readers have completed and no new reader can enter the protocol recv path before resources are freed. This allows the protocol-specific recv functions to remove the "HCI_UART_REGISTERED" guard without risking a null pointer dereference if hci_register_dev() fails.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-476
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 5.4.293 before 5.5; from 5.10.237 before 5.10.258; from 5.15.181 before 5.15.209; from 6.1.135 before 6.1.175; from 6.6.88 before 6.6.141; from 6.12.24 before 6.12.91; from 6.13.12 before 6.14; from 6.14.3 before 6.18.33; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104patch
- https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211bpatch
- https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5apatch
- https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718patch
- https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40patch
- https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07patch
- https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232patch
- https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.