Vulnerability in Linux

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• git.kernel.org/stable/c/173457fa3e99ef4188dd0fe63e4dee98d0e441a9
• git.kernel.org/stable/c/320dedad15e8bbaecc8d2d7fd4189defb84caa85
• git.kernel.org/stable/c/47d67ec424e63e61e9eb58633d43a9d58a1852b6
• git.kernel.org/stable/c/598686f5d65b9af2223ed9d22fadba16e09f6ca8
• git.kernel.org/stable/c/68f0bcc4e16e31ff8dbe6ca93116eb70d7b6ac44
• git.kernel.org/stable/c/70b0a27bdde0cb524349c8261202c7c9393cf5e9
• git.kernel.org/stable/c/c1fd465ea1c5aef459f9bc3ac602b5353e0f536f
• git.kernel.org/stable/c/e93fad891c72deb84cae49430163b384ebcc92b1