CVE-2026-68333

What the bug is

fsl_mc_get_endpoint() returns the MAC endpoint device with a reference taken through device_find_child(). The switch port connect path stores that device in mac->mc_dev and keeps it for the lifetime of the connected MAC object. However, the disconnect path only closes the MAC and frees the dpaa2_mac object. It does not drop the endpoint device reference stored in mac->mc_dev, so every successful connect leaks that device reference when the MAC is later disconnected. Drop the endpoint device reference before freeing the dpaa2_mac object.

Where it lives

The fix touches these files. If the subsystem is one you do not use, the practical exposure is lower, though the package is still the vulnerable one.

drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c

What this is

DPAA2 ETHERNET SWITCH DRIVERMAINTAINERS section matched on drivers/net/ethernet/freescale/dpaa2/dpaa2-switch* · netdev@vger.kernel.org · Maintained

Kernel module

none to look for. The file would have gone into fsl_dpaa2_switch, and Debian does not compile it into that module, so finding fsl_dpaa2_switch in lsmod would say nothing about this CVE.

Check it on the machine

grep -wE 'CONFIG_ETHERNET|CONFIG_FSL_DPAA2_SWITCH|CONFIG_NET_VENDOR_FREESCALE' /boot/config-$(uname -r)

Reads the booted kernel's own configuration, on the machine and nowhere else. =y is built in, =m is a module, and an is not set line means the code is not there.

Show whether Debian builds this, per release

Debian does not build this code. In 5 releases below, every kernel flavour Debian publishes has the switch off, so the vulnerable file is compiled into no kernel binary Debian ships.

• bookworm, trixie, forky, sid, bookworm · linux-6.12n

n

not enabled on any flavour - this release does not build the code

Build switches

CONFIG_ETHERNET, CONFIG_FSL_DPAA2_SWITCH, CONFIG_NET_VENDOR_FREESCALE

Reads as

all on means the file is compiled; any one off means it is not.

From the configuration Debian publishes for every kernel flavour it builds. It covers only the architectures Debian ships a linux-config package for, and nothing about a kernel you built yourself. Debian's own status above stays authoritative about the source package.MAINTAINERS kbuild Makefiles Debian linux-config packages

Signals

Published

2026-08-10 (2 months ago)source

CVSS

no vector published, unrated

Attack vector

not published

EPSS

0.18%, higher than 7.1% of all CVEssource

CISA KEV

not listedthe KEV catalogue

Debian urgency

not yet assignedsource

Subsystem

drivers/net

Upstream fixes

The versions the CNA records as introducing and fixing this, and the commit for each. source

Introduced	Fixed in	Commit
5.15	5.15.216	196f73015378
5.15	6.1.183	0e9a6811eb61
5.15	6.6.148	1f4ca61b7a93
5.15	6.12.101	680eecc850d3
5.15	6.18.42	26ac2d360234
5.15	7.1.6	c27694ff6748
5.15	7.2	4c1eabbef7a1

Debian advisories