Bluetooth: hci_sock: reject out-of-range OCF values

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sock: reject out-of-range OCF values The raw HCI socket security filter has 128 OCF bits per supported OGF, but masks the 10-bit OCF with 127 before looking up the command. An unprivileged socket can therefore submit a reserved OCF that aliases an allowlisted command modulo 128. A conforming controller should reject reserved opcodes. Nevertheless, the security decision must apply to the opcode that will actually be sent, especially since controller-specific behavior is outside the host stack's control. Reject OCF values that cannot be represented by the security filter instead of aliasing them onto an unrelated command.

Timeline

1. Oct 18, 2026, 3:15 PM UTCCVE published
2. Oct 19, 2026, 9:19 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 70b0a27bdde0cb524349c8261202c7c9393cf5e9; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 598686f5d65b9af2223ed9d22fadba16e09f6ca8; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in c1fd465ea1c5aef459f9bc3ac602b5353e0f536f; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 68f0bcc4e16e31ff8dbe6ca93116eb70d7b6ac44; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 320dedad15e8bbaecc8d2d7fd4189defb84caa85; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 173457fa3e99ef4188dd0fe63e4dee98d0e441a9; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 47d67ec424e63e61e9eb58633d43a9d58a1852b6; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in e93fad891c72deb84cae49430163b384ebcc92b1

• Linux Linux

  2.6.12

• KernelLinux

  From 2.6.12 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.55; From 6.19.0 · fixed in 7.2.9

References 8