CVE-2026-43018 PUBLISHED

Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt

Assigner: Linux
Reserved: 01.05.2026 Published: 01.05.2026 Updated: 01.05.2026

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt

hci_conn lookup and field access must be covered by hdev lock in hci_le_remote_conn_param_req_evt, otherwise it's possible it is freed concurrently.

Extend the hci_dev_lock critical section to cover all conn usage.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 95118dd4edfec950898a00180c6f998df0a6406d to 59eecf0ffde15670e6a5e10c47be67f73d843b20 (excl.)
  • affected from 95118dd4edfec950898a00180c6f998df0a6406d to 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81 (excl.)
  • affected from 95118dd4edfec950898a00180c6f998df0a6406d to 7cadb03be37e761130edb153544fe0770a842b19 (excl.)
  • affected from 95118dd4edfec950898a00180c6f998df0a6406d to 1d0bdbfe3e91c11f0a704c52443a9446a10d699c (excl.)
  • affected from 95118dd4edfec950898a00180c6f998df0a6406d to ea3cd36d7382d5f8309df04c275d20df139ed42c (excl.)
  • affected from 95118dd4edfec950898a00180c6f998df0a6406d to b255531b27da336571411248c2a72a350662bd09 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.17 is affected
  • unaffected from 0 to 5.17 (excl.)
  • unaffected from 6.1.168 to 6.1.* (incl.)
  • unaffected from 6.6.134 to 6.6.* (incl.)
  • unaffected from 6.12.81 to 6.12.* (incl.)
  • unaffected from 6.18.22 to 6.18.* (incl.)
  • unaffected from 6.19.12 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References