CVE-2026-90319

What the bug is

rio_alloc_net() stores the newly allocated rio_net in mport->net before rio_scan_alloc_net() registers the device. If rio_add_net() fails, rio_scan_alloc_net() drops the device reference with put_device(), which releases the rio_net through the device release callback. However, mport->net is left pointing at the freed object. A later mport unregister path can then dereference the dangling mport->net pointer and may try to free the same rio_net again. Clear mport->net in the rio_add_net() failure path, matching the cleanup done for the destID table allocation failure 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/rapidio/rio-scan.c

What this is

RAPIDIO SUBSYSTEMMAINTAINERS section matched on drivers/rapidio/ · Maintained

Kernel module

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

Check it on the machine

grep -wE 'CONFIG_RAPIDIO|CONFIG_RAPIDIO_ENUM_BASIC' /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_RAPIDIO, CONFIG_RAPIDIO_ENUM_BASIC

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

2026-09-17 (31 days ago)source

CVSS

no vector published, unrated

Attack vector

not published

EPSS

0.21%, higher than 10.5% of all CVEssource

CISA KEV

not listedthe KEV catalogue

Debian urgency

not yet assignedsource

Subsystem

drivers/rapidio

Upstream fixes

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

Introduced	Fixed in	Commit
5.10.235	5.10.270	24f60ebabeb8
5.15.179	5.15.221	6a760a53e730
6.1.131	6.1.188	3f00999e44d9
6.6.83	6.6.157	332591a245de
6.12.19	6.12.110	75f0bc167b96
6.14	6.18.52	44a37264b269
6.14	7.2.6	530a9d5ef831
6.14	7.3	b74030fbf187
5.4.291	0	0
6.13.7	0	0

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