CVE-2026-97434

What the bug is

All the NAPI instances for a DPSW device are attached to the first switch port's net_device but shared by all ports. The NAPI instances get disabled only once the last port goes down. This causes an issue on the .remove() path where each port is unregistered and freed one at a time, causing the NAPI instances to be deleted even though they are not disabled. In order to avoid this, split up the unregister_netdev() calls from the free_netdev() so that we make sure all ports go down before we attempt a deletion of NAPI instances. Also, make the netif_napi_del() explicit as it is on the .probe() path.

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

2026-09-24 (24 days ago)source

CVSS

no vector published, unrated

Attack vector

not published

EPSS

0.17%, higher than 6.2% 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
5.13	5.15.222	d39603e21087
5.13	6.1.189	bd16f46d0796
5.13	6.6.158	c996faba71fc
5.13	6.12.111	569df157eb87
5.13	6.18.53	6518f87771c8
5.13	7.2	e23d7c8c1d4b

Debian advisories