Upstream information
Description
In the Linux kernel, the following vulnerability has been resolved:Bluetooth: hci_core: Serialize ACL scheduling with channel deletion
hci_chan_sent() selects a channel under RCU but drops the read lock before
accessing chan->conn and returning the channel. The ACL and LE schedulers
then use its packet queue and update its transmit counters without any
protection against channel deletion.
After TX selects a channel and releases RCU, a disconnect command timeout
on the separate request workqueue can run hci_conn_failed() and
l2cap_conn_del(). hci_chan_del() can then unlink the channel, complete
synchronize_rcu(), purge its queue and free it before TX resumes. This
causes use-after-free both in hci_chan_sent() and in its callers.
KASAN reported:
BUG: KASAN: slab-use-after-free in hci_chan_sent+0x892/0x9b0
Workqueue: hci0 hci_tx_work
Call Trace:
hci_chan_sent+0x892/0x9b0
hci_tx_work+0x5e6/0xb70
Allocated by task 91:
hci_chan_create+0xe3/0x350
l2cap_conn_add.part.0+0x12/0xa30
l2cap_chan_connect+0x110d/0x1b60
l2cap_sock_connect+0x310/0x530
Freed by task 99:
hci_chan_del+0x11f/0x170
l2cap_conn_del+0x4f1/0x800
l2cap_connect_cfm+0x88c/0xd30
hci_conn_failed+0x150/0x250
hci_abort_conn_sync+0x3e3/0x800
hci_cmd_sync_run+0x7e/0xc0
hci_abort_conn+0x105/0x1f0
disconnect_sync+0x157/0x290
hci_cmd_sync_work+0x13c/0x290
Hold the existing device mutex across channel selection and transmission
in both schedulers to serialize them with channel teardown. Keep timeout
handling outside the critical sections because hci_link_tx_to() acquires
the same mutex. This also permits the transmit path to sleep, unlike
extending the RCU read-side critical section across packet submission.
SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| 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: 1286667 [NEW]SUSE Security Advisories:
- SUSE-SU-2026:5091-1, published Wed Nov 4 13:03:32 CET 2026
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| Container bci/bci-sle15-kernel-module-devel:15.7-61.43 |
| |
| Container suse/hpc/warewulf4-x86_64/sle-hpc-node:15.7.20.8.205 Image SLES15-SP7-BYOS-Azure Image SLES15-SP7-GCE-3P Image SLES15-SP7-HPC-Azure Image SLES15-SP7-HPC-BYOS-Azure Image SLES15-SP7-Hardened-BYOS-Azure Image SLES15-SP7-SAPCAL-Azure |
| |
| Image SLES15-SP7-Azure-3P Image SLES15-SP7-Azure-Basic Image SLES15-SP7-Azure-Standard |
| |
| Image SLES15-SP7-SAP-Azure Image SLES15-SP7-SAP-Azure-3P Image SLES15-SP7-SAP-BYOS-Azure Image SLES15-SP7-SAP-Hardened-Azure Image SLES15-SP7-SAP-Hardened-BYOS-Azure |
| |
| SUSE Linux Enterprise Desktop 15 SP7 |
| 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 |
| Patchnames: SUSE-SLE-Product-HA-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64) |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64) |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 |
| Patchnames: SUSE-SLE-Module-Development-Tools-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64) |
| SUSE Linux Enterprise Module for Legacy 15 SP7 |
| Patchnames: SUSE-SLE-Module-Legacy-15-SP7-2026-5091 (aarch64,ppc64le,s390x,x86_64) |
| SUSE Linux Enterprise Module for Public Cloud 15 SP7 |
| 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 |
| 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 |
| Patchnames: SUSE-SLE-Product-WE-15-SP7-2026-5091 (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 | Affected |
| SUSE Linux Enterprise Micro 5.4 | kernel-rt | Affected |
| SUSE Linux Enterprise Micro 5.4 | kernel-source | Affected |
| SUSE Linux Enterprise Micro 5.4 | kernel-source-rt | Affected |
| SUSE Linux Enterprise Micro 5.5 | kernel-default | Affected |
| SUSE Linux Enterprise Micro 5.5 | kernel-source | Affected |
| SUSE Linux Enterprise Micro 5.5 | kernel-source-rt | 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 | Affected |
| SUSE Linux Micro 6.0 | kernel-source | Affected |
| SUSE Linux Micro 6.0 | kernel-source-rt | Affected |
| SUSE Linux Micro 6.1 | kernel-default | Affected |
| SUSE Linux Micro 6.1 | kernel-source | Affected |
| SUSE Linux Micro 6.1 | kernel-source-rt | Affected |
| 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 | Affected |
| SUSE Linux Micro Extras 6.0 | kernel-source | Affected |
| SUSE Linux Micro Extras 6.0 | kernel-source-rt | Affected |
| SUSE Linux Micro Extras 6.1 | kernel-default | Affected |
| SUSE Linux Micro Extras 6.1 | kernel-source | Affected |
| 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 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | kernel-source | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | kernel-default | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | kernel-source | 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 | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | kernel-source | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | kernel-default | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | kernel-source | 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 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kernel-source | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-default | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-source | 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 | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | kernel-source | 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 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | kernel-source | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-source | 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 | Affected |
| SUSE Linux Enterprise Micro 5.3 | kernel-rt | Affected |
| SUSE Linux Enterprise Micro 5.3 | kernel-source | Affected |
| SUSE Linux Enterprise Micro 5.3 | kernel-source-rt | 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 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | kernel-source | 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 | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP5 | kernel-source | 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 | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | kernel-source-rt | Affected |
| SUSE Linux Enterprise Real Time 15 SP5 | kernel-source-rt | 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 | Affected |
| SUSE Linux Enterprise Server 15 SP5 | kernel-source | 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 | Affected |
| SUSE Manager Proxy LTS 4.3 | kernel-source | 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 | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | kernel-source | 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 | Affected |
| SUSE Manager Server LTS 4.3 | kernel-source | Affected |
| SUSE Real Time Module 15 SP4 | kernel-source-rt | Affected |
| SUSE Real Time Module 15 SP5 | kernel-source-rt | Affected |
| openSUSE Leap 15.3 | kernel-source | Not affected |
| openSUSE Leap 15.4 | kernel-source | Affected |
| openSUSE Leap 15.4 | kernel-source-rt | Affected |
| openSUSE Leap 15.5 | kernel-source | Affected |
| openSUSE Leap 15.5 | kernel-source-rt | Affected |
| openSUSE Leap 15.6 | kernel-source | Not affected |
SUSE Timeline for this CVE
CVE page created: Sun Oct 18 21:49:46 2026CVE page last modified: Fri Nov 6 21:55:52 2026