CVE-2026-98460: Bluetooth: hci_sock: reject out-of-range OCF values

CVE-2026-98460: Bluetooth: hci_sock: reject out-of-range OCF values

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

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.

The Linux kernel CVE team has assigned CVE-2026-98460 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.10.271 with commit 70b0a27bdde0cb524349c8261202c7c9393cf5e9
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.15.222 with commit 598686f5d65b9af2223ed9d22fadba16e09f6ca8
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.1.189 with commit c1fd465ea1c5aef459f9bc3ac602b5353e0f536f
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.6.158 with commit 68f0bcc4e16e31ff8dbe6ca93116eb70d7b6ac44
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.12.112 with commit 320dedad15e8bbaecc8d2d7fd4189defb84caa85
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.18.55 with commit 173457fa3e99ef4188dd0fe63e4dee98d0e441a9
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.2.9 with commit 47d67ec424e63e61e9eb58633d43a9d58a1852b6
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.3-rc5 with commit e93fad891c72deb84cae49430163b384ebcc92b1

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-98460
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	net/bluetooth/hci_sock.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/70b0a27bdde0cb524349c8261202c7c9393cf5e9
	https://git.kernel.org/stable/c/598686f5d65b9af2223ed9d22fadba16e09f6ca8
	https://git.kernel.org/stable/c/c1fd465ea1c5aef459f9bc3ac602b5353e0f536f
	https://git.kernel.org/stable/c/68f0bcc4e16e31ff8dbe6ca93116eb70d7b6ac44
	https://git.kernel.org/stable/c/320dedad15e8bbaecc8d2d7fd4189defb84caa85
	https://git.kernel.org/stable/c/173457fa3e99ef4188dd0fe63e4dee98d0e441a9
	https://git.kernel.org/stable/c/47d67ec424e63e61e9eb58633d43a9d58a1852b6
	https://git.kernel.org/stable/c/e93fad891c72deb84cae49430163b384ebcc92b1