CVE-2026-98633: Bluetooth: btnxpuart: Fix skb leak in nxp_process_fw_dump()

CVE-2026-98633: Bluetooth: btnxpuart: Fix skb leak in nxp_process_fw_dump()

[Greg Kroah-Hartman]

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

Description
===========

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

Bluetooth: btnxpuart: Fix skb leak in nxp_process_fw_dump()

When CONFIG_DEV_COREDUMP=n, hci_devcd_append() returns -EOPNOTSUPP
without freeing its skb argument. This leaks the cloned skb and also
prevents nxp_set_ind_reset() from being called to perform recovery.

Fix by guarding the hci_devcd_append(hdev, skb_clone(skb, GFP_ATOMIC))
call with IS_ENABLED(CONFIG_DEV_COREDUMP).

The Linux kernel CVE team has assigned CVE-2026-98633 to this issue.


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

	Issue introduced in 6.15 with commit 998e447f443f138c90faa6ff3845082af419070e and fixed in 6.18.55 with commit 8a36598050cd1e5abb1d5ed42cc224cfcb538c4f
	Issue introduced in 6.15 with commit 998e447f443f138c90faa6ff3845082af419070e and fixed in 7.2.9 with commit edcb84ee607a9ddfc6f2771a7f399115f0b0f19d
	Issue introduced in 6.15 with commit 998e447f443f138c90faa6ff3845082af419070e and fixed in 7.3-rc5 with commit f2bbb36426581045a8bf7793da5419b9375e4348

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-2026-98633
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:
	drivers/bluetooth/btnxpuart.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/8a36598050cd1e5abb1d5ed42cc224cfcb538c4f
	https://git.kernel.org/stable/c/edcb84ee607a9ddfc6f2771a7f399115f0b0f19d
	https://git.kernel.org/stable/c/f2bbb36426581045a8bf7793da5419b9375e4348