Upstream information

CVE-2026-98773 at MITRE

Description

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

USB: cdc-acm: skip URB restart in port_shutdown if disconnected

acm_port_shutdown() is called from the tty-port machinery whenever the
last user closes the port. acm_disconnect() sets acm->disconnected and
calls tty_port_tty_vhangup(), which eventually triggers port_shutdown().
At that point acm_disconnect() has already called acm_poison_urbs() and
is about to free the control and read URBs.

However, acm_port_shutdown() unconditionally calls acm_unpoison_urbs()
and, when the ALWAYS_POLL_CTRL quirk is set, immediately re-submits the
ctrlurb and all read URBs. If the concurrent acm_disconnect() then
frees those URBs and their DMA buffers while they are in-flight, the
result is a use-after-free in acm_ctrl_irq() or acm_read_bulk_callback()
accessing the freed DMA memory.

Fix by checking acm->disconnected after draining the delayed anchor and
returning early: if we are in a disconnect path the URBs must remain
poisoned and must not be resubmitted.

The early return is placed after the delayed-anchor drain loop because
that loop only cancels write-side accounting (wb->use = false and
autopm counter) and does not touch the hardware path.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail SUSE
Base Score 5.5
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1

Note from the SUSE Security Team on the kernel-default package

SUSE will no longer fix all CVEs in the Linux Kernel anymore, but declare some bug classes as won't fix. Please refer to TID 21496 for more details.

SUSE Bugzilla entry: 1286160 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Container bci/bci-sle15-kernel-module-devel:15.7-61.43
  • kernel-default-devel >= 6.4.0-150700.53.90.1
  • kernel-devel >= 6.4.0-150700.53.90.1
  • kernel-macros >= 6.4.0-150700.53.90.1
  • kernel-syms >= 6.4.0-150700.53.90.1
Container suse/hpc/warewulf4-x86_64/sle-hpc-node:15.7.20.8.205
  • kernel-default >= 6.4.0-150700.53.90.1
Container suse/sl-micro/6.1/base-os-container:2.2.1-5.212
  • kernel-default >= 6.4.0-159998.55.1
Container suse/sl-micro/6.1/kvm-os-container:2.2.1-5.213
  • kernel-default-base >= 6.4.0-159998.55.1.159998.21.42
SUSE Linux Enterprise Desktop 15 SP7
  • kernel-64kb >= 6.4.0-150700.53.90.1
  • kernel-64kb-devel >= 6.4.0-150700.53.90.1
  • kernel-default >= 6.4.0-150700.53.90.1
  • kernel-default-base >= 6.4.0-150700.53.90.1.150700.17.51.1
  • kernel-default-devel >= 6.4.0-150700.53.90.1
  • kernel-default-extra >= 6.4.0-150700.53.90.1
  • kernel-devel >= 6.4.0-150700.53.90.1
  • kernel-docs >= 6.4.0-150700.53.90.1
  • kernel-macros >= 6.4.0-150700.53.90.1
  • kernel-obs-build >= 6.4.0-150700.53.90.1
  • kernel-source >= 6.4.0-150700.53.90.1
  • kernel-syms >= 6.4.0-150700.53.90.1
  • kernel-zfcpdump >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE-SLE-Module-Development-Tools-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE-SLE-Product-WE-15-SP7-2026-5091 (x86_64)
SUSE Linux Enterprise High Availability Extension 15 SP7
  • cluster-md-kmp-default >= 6.4.0-150700.53.90.1
  • dlm-kmp-default >= 6.4.0-150700.53.90.1
  • gfs2-kmp-default >= 6.4.0-150700.53.90.1
  • ocfs2-kmp-default >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Product-HA-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE Linux Enterprise Module for Basesystem 15 SP7
  • kernel-64kb >= 6.4.0-150700.53.90.1
  • kernel-64kb-devel >= 6.4.0-150700.53.90.1
  • kernel-default >= 6.4.0-150700.53.90.1
  • kernel-default-base >= 6.4.0-150700.53.90.1.150700.17.51.1
  • kernel-default-devel >= 6.4.0-150700.53.90.1
  • kernel-devel >= 6.4.0-150700.53.90.1
  • kernel-macros >= 6.4.0-150700.53.90.1
  • kernel-zfcpdump >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE Linux Enterprise Module for Development Tools 15 SP7
  • kernel-docs >= 6.4.0-150700.53.90.1
  • kernel-obs-build >= 6.4.0-150700.53.90.1
  • kernel-source >= 6.4.0-150700.53.90.1
  • kernel-syms >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Module-Development-Tools-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE Linux Enterprise Module for Legacy 15 SP7
  • reiserfs-kmp-default >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Module-Legacy-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE Linux Enterprise Module for Public Cloud 15 SP7
  • kernel-azure >= 6.4.0-150700.53.90.1
  • kernel-azure-devel >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Module-Public-Cloud-15-SP7-2026-5091 (aarch64,x86_64)
SUSE Linux Enterprise Server 15 SP7
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • kernel-64kb >= 6.4.0-150700.53.90.1
  • kernel-64kb-devel >= 6.4.0-150700.53.90.1
  • kernel-azure >= 6.4.0-150700.53.90.1
  • kernel-azure-devel >= 6.4.0-150700.53.90.1
  • kernel-default >= 6.4.0-150700.53.90.1
  • kernel-default-base >= 6.4.0-150700.53.90.1.150700.17.51.1
  • kernel-default-devel >= 6.4.0-150700.53.90.1
  • kernel-default-extra >= 6.4.0-150700.53.90.1
  • kernel-devel >= 6.4.0-150700.53.90.1
  • kernel-docs >= 6.4.0-150700.53.90.1
  • kernel-macros >= 6.4.0-150700.53.90.1
  • kernel-obs-build >= 6.4.0-150700.53.90.1
  • kernel-source >= 6.4.0-150700.53.90.1
  • kernel-syms >= 6.4.0-150700.53.90.1
  • kernel-zfcpdump >= 6.4.0-150700.53.90.1
  • reiserfs-kmp-default >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE-SLE-Module-Development-Tools-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE-SLE-Module-Legacy-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64)
SUSE-SLE-Module-Public-Cloud-15-SP7-2026-5091 (aarch64,x86_64)
SUSE-SLE-Product-WE-15-SP7-2026-5091 (x86_64)
SUSE Linux Enterprise Workstation Extension 15 SP7
  • kernel-default-extra >= 6.4.0-150700.53.90.1
 Patchnames:
SUSE-SLE-Product-WE-15-SP7-2026-5091 (x86_64)
SUSE Linux Micro 6.0
  • kernel-default >= 6.4.0-159998.55.1
  • kernel-default-base >= 6.4.0-159998.55.1.159998.21.42
  • kernel-default-livepatch >= 6.4.0-159998.55.1
  • kernel-devel >= 6.4.0-159998.55.1
  • kernel-kvmsmall >= 6.4.0-159998.55.1
  • kernel-macros >= 6.4.0-159998.55.1
  • kernel-source >= 6.4.0-159998.55.1
 Patchnames:
SUSE-SLE-Micro-6.0-kernel-759 (aarch64,s390x,x86_64)

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 kernel-64kb Released
SUSE Linux Enterprise Desktop 15 SP7 kernel-default Released
SUSE Linux Enterprise Desktop 15 SP7 kernel-default-base Released
SUSE Linux Enterprise Desktop 15 SP7 kernel-docs Released
SUSE Linux Enterprise Desktop 15 SP7 kernel-obs-build Released
SUSE Linux Enterprise Desktop 15 SP7 kernel-source Released
SUSE Linux Enterprise Desktop 15 SP7 kernel-syms Released
SUSE Linux Enterprise Desktop 15 SP7 kernel-zfcpdump Released
SUSE Linux Enterprise High Availability Extension 15 SP7 kernel-default Released
SUSE Linux Enterprise High Availability Extension 15 SP7 kernel-source Already fixed
SUSE Linux Enterprise High Availability Extension 16.0 kernel-default Already fixed
SUSE Linux Enterprise High Availability Extension 16.0 kernel-source Already fixed
SUSE Linux Enterprise Micro 5.4 kernel-default Not affected
SUSE Linux Enterprise Micro 5.4 kernel-rt Not affected
SUSE Linux Enterprise Micro 5.4 kernel-source Not affected
SUSE Linux Enterprise Micro 5.4 kernel-source-rt Not affected
SUSE Linux Enterprise Micro 5.5 kernel-default Not affected
SUSE Linux Enterprise Micro 5.5 kernel-source Not affected
SUSE Linux Enterprise Micro 5.5 kernel-source-rt Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 kernel-64kb Released
SUSE Linux Enterprise Module for Basesystem 15 SP7 kernel-default Released
SUSE Linux Enterprise Module for Basesystem 15 SP7 kernel-default-base Released
SUSE Linux Enterprise Module for Basesystem 15 SP7 kernel-source Released
SUSE Linux Enterprise Module for Basesystem 15 SP7 kernel-zfcpdump Released
SUSE Linux Enterprise Module for Development Tools 15 SP7 kernel-default Released
SUSE Linux Enterprise Module for Development Tools 15 SP7 kernel-docs Released
SUSE Linux Enterprise Module for Development Tools 15 SP7 kernel-obs-build Released
SUSE Linux Enterprise Module for Development Tools 15 SP7 kernel-source Released
SUSE Linux Enterprise Module for Development Tools 15 SP7 kernel-syms Released
SUSE Linux Enterprise Module for Legacy 15 SP7 kernel-default Released
SUSE Linux Enterprise Module for Public Cloud 15 SP7 kernel-azure Released
SUSE Linux Enterprise Real Time 15 SP7 kernel-source-rt Already fixed
SUSE Linux Enterprise Server 15 SP7 kernel-64kb Released
SUSE Linux Enterprise Server 15 SP7 kernel-azure Released
SUSE Linux Enterprise Server 15 SP7 kernel-default Released
SUSE Linux Enterprise Server 15 SP7 kernel-default-base Released
SUSE Linux Enterprise Server 15 SP7 kernel-docs Released
SUSE Linux Enterprise Server 15 SP7 kernel-obs-build Released
SUSE Linux Enterprise Server 15 SP7 kernel-source Released
SUSE Linux Enterprise Server 15 SP7 kernel-syms Released
SUSE Linux Enterprise Server 15 SP7 kernel-zfcpdump Released
SUSE Linux Enterprise Server 16.0 kernel-default Already fixed
SUSE Linux Enterprise Server 16.0 kernel-source Already fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-64kb Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-azure Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-default Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-default-base Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-docs Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-obs-build Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-source Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-syms Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 kernel-zfcpdump Released
SUSE Linux Enterprise Server for SAP applications 16.0 kernel-default Already fixed
SUSE Linux Enterprise Server for SAP applications 16.0 kernel-source Already fixed
SUSE Linux Enterprise Workstation Extension 15 SP7 kernel-default Released
SUSE Linux Micro 6.0 kernel-default Released
SUSE Linux Micro 6.0 kernel-default-base Released
SUSE Linux Micro 6.0 kernel-kvmsmall Released
SUSE Linux Micro 6.0 kernel-source Released
SUSE Linux Micro 6.0 kernel-source-rt Already fixed
SUSE Linux Micro 6.1 kernel-default Already fixed
SUSE Linux Micro 6.1 kernel-source Already fixed
SUSE Linux Micro 6.1 kernel-source-rt Already fixed
SUSE Linux Micro 6.2 kernel-default Already fixed
SUSE Linux Micro 6.2 kernel-source Already fixed
SUSE Linux Micro Extras 6.0 kernel-default Already fixed
SUSE Linux Micro Extras 6.0 kernel-source Already fixed
SUSE Linux Micro Extras 6.0 kernel-source-rt Already fixed
SUSE Linux Micro Extras 6.1 kernel-default Already fixed
SUSE Linux Micro Extras 6.1 kernel-source Already fixed
SUSE Real Time Module 15 SP7 kernel-source-rt Already fixed
openSUSE Leap 16.0 kernel-source Already fixed
openSUSE Leap 16.1 kernel-source Already fixed
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 12 SP5 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-default Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-default Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE kernel-default Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE kernel-source Not affected
SUSE Linux Enterprise Server 12 SP5 kernel-source Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS kernel-default Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS kernel-default Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 15 SP5-LTSS kernel-default Not affected
SUSE Linux Enterprise Server 15 SP5-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 15 SP6-LTSS kernel-default Not affected
SUSE Linux Enterprise Server 15 SP6-LTSS kernel-source Not affected
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 kernel-default Not affected
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-default Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-default Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 kernel-default Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 kernel-source Not affected
Products past their end of life and not receiving proactive updates anymore.
SUSE CaaS Platform 4.0 kernel-source Not affected
SUSE Enterprise Storage 6 kernel-source Not affected
SUSE Enterprise Storage 7 kernel-source Not affected
SUSE Enterprise Storage 7.1 kernel-source Not affected
SUSE Linux Enterprise Desktop 11 SP4 kernel-source Not affected
SUSE Linux Enterprise Desktop 15 SP1 kernel-source Not affected
SUSE Linux Enterprise Desktop 15 SP2 kernel-source Not affected
SUSE Linux Enterprise Desktop 15 SP3 kernel-source Not affected
SUSE Linux Enterprise Desktop 15 SP4 kernel-source Not affected
SUSE Linux Enterprise Desktop 15 SP5 kernel-source Not affected
SUSE Linux Enterprise Desktop 15 SP6 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-source Not affected
SUSE Linux Enterprise Micro 5.0 kernel-default Not affected
SUSE Linux Enterprise Micro 5.1 kernel-default Not affected
SUSE Linux Enterprise Micro 5.2 kernel-default Not affected
SUSE Linux Enterprise Micro 5.2 kernel-source Not affected
SUSE Linux Enterprise Micro 5.3 kernel-default Not affected
SUSE Linux Enterprise Micro 5.3 kernel-rt Not affected
SUSE Linux Enterprise Micro 5.3 kernel-source Not affected
SUSE Linux Enterprise Micro 5.3 kernel-source-rt Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1 kernel-source Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 kernel-source Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP3 kernel-source Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP4 kernel-source Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP5 kernel-source Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP6 kernel-source Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP1 kernel-source Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP2 kernel-source Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP3 kernel-source Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP4 kernel-source Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP5 kernel-source Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP6 kernel-source Not affected
SUSE Linux Enterprise Real Time 15 SP2 kernel-source Not affected
SUSE Linux Enterprise Real Time 15 SP3 kernel-source Not affected
SUSE Linux Enterprise Real Time 15 SP4 kernel-source Not affected
SUSE Linux Enterprise Real Time 15 SP4 kernel-source-rt Not affected
SUSE Linux Enterprise Real Time 15 SP5 kernel-source-rt Not affected
SUSE Linux Enterprise Server 11 SP4 kernel-source Not affected
SUSE Linux Enterprise Server 11 SP4-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 15 SP1 kernel-source Not affected
SUSE Linux Enterprise Server 15 SP1-BCL kernel-source Not affected
SUSE Linux Enterprise Server 15 SP1-LTSS kernel-default Not affected
SUSE Linux Enterprise Server 15 SP1-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 15 SP2 kernel-source Not affected
SUSE Linux Enterprise Server 15 SP2-BCL kernel-source Not affected
SUSE Linux Enterprise Server 15 SP2-LTSS kernel-default Not affected
SUSE Linux Enterprise Server 15 SP2-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 15 SP3 kernel-source Not affected
SUSE Linux Enterprise Server 15 SP3-BCL kernel-source Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS kernel-default Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS kernel-source Not affected
SUSE Linux Enterprise Server 15 SP4 kernel-source Not affected
SUSE Linux Enterprise Server 15 SP5 kernel-source Not affected
SUSE Linux Enterprise Server 15 SP6 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 kernel-source Not affected
SUSE Manager Proxy 4.0 kernel-source Not affected
SUSE Manager Proxy 4.1 kernel-source Not affected
SUSE Manager Proxy 4.2 kernel-source Not affected
SUSE Manager Proxy 4.3 kernel-source Not affected
SUSE Manager Proxy LTS 4.3 kernel-source Not affected
SUSE Manager Retail Branch Server 4.0 kernel-source Not affected
SUSE Manager Retail Branch Server 4.1 kernel-source Not affected
SUSE Manager Retail Branch Server 4.2 kernel-source Not affected
SUSE Manager Retail Branch Server 4.3 kernel-source Not affected
SUSE Manager Retail Branch Server LTS 4.3 kernel-source Not affected
SUSE Manager Server 4.0 kernel-source Not affected
SUSE Manager Server 4.1 kernel-source Not affected
SUSE Manager Server 4.2 kernel-source Not affected
SUSE Manager Server 4.3 kernel-source Not affected
SUSE Manager Server LTS 4.3 kernel-source Not affected
SUSE Real Time Module 15 SP4 kernel-source-rt Not affected
SUSE Real Time Module 15 SP5 kernel-source-rt Not affected
openSUSE Leap 15.3 kernel-source Not affected
openSUSE Leap 15.4 kernel-source Not affected
openSUSE Leap 15.4 kernel-source-rt Not affected
openSUSE Leap 15.5 kernel-source Not affected
openSUSE Leap 15.5 kernel-source-rt Not affected
openSUSE Leap 15.6 kernel-source Not affected

SUSE Timeline for this CVE

CVE page created: Sun Oct 18 21:49:48 2026
CVE page last modified: Thu Nov 5 20:56:30 2026