nfc: pn533: properly drop the usb interface reference on disconnect

published 2026-03-25 7 mo ago modified 2026-10-15 25 d ago also EUVD-2026-15220

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits: 0; none known

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

When the device is disconnected from the driver, there is a "dangling" reference count on the usb interface that was grabbed in the probe callback. Fix this up by properly dropping the reference after we are done with it.

Patch / fix

fixed in 1 distros 3 links 8

Linux Linux 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7, 7.0

debian ubuntu suse

linux Debian 12 6.1.170-1
linux Debian 13 6.12.85-1
linux Debian 14 6.19.8-1

debian advisories DEBIAN-CVE-2026-23291

linux Ubuntu 22.04 LTS 5.15.0-186.196
linux Ubuntu 24.04 LTS 6.8.0-136.136
linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72
linux-gke Ubuntu 22.04 LTS 5.15.0-1108.114
linux-gke Ubuntu 24.04 LTS 6.8.0-1059.67

ubuntu advisories UBUNTU-CVE-2026-23291

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.55.1
kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.55.1
kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.55.1
kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.55.1
kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1.150700.17.33.1

suse advisories SUSE-SU-2026:2238-1 SUSE-SU-2026:21834-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-23291 updated 2026-11-07

kernel: nfc: pn533: properly drop the usb interface reference on disconnect

Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-26-295-16 updated 2026-10-22 cvss 5.5

Siemens SIMATIC S7-1500 TM MFP

Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux Linux
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Technology feeds

Linux kernel rss critical rss

References

Sources

CVE List CVE-2026-23291
NVD CVE-2026-23291

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary