TI-2026-61298 Aliases CVE-2026-90256 GHSA-323m-rj3w-9jqp

Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind

LOW 38Published 2026-09-17 · Updated 2026-10-21

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind hci_conn::l2cap_data is accessed without locks in l2cap_disconn_ind via hci_conn_timeout (disc_work) -> hci_proto_disconn_ind -> l2cap_disconn_ind. This is UAF if the l2cap_conn is deleted concurrently. disc_work is disabled sync in hci_conn_del(), so we cannot take hci_dev_lock in disc_work. Fix by using proto_lock to guard l2cap_data, in addition to hdev->lock which is held in other access paths.

Why it matters now

EPSS 0.00318 24th percentileScored 2026-11-07

Fix Partial Linux (Linux): 6.6.160, 6.12.114, 6.14 +2Red Hat: 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.6.84 to before 6.6.160; 6.12.20 to before 6.12.114; 6.13.8 to before 6.14	6.6.160, 6.12.114, 6.14	Patch available	CNA
Linux	Linux	6.14 and later	6.6.160, 6.12.114, 7.2.6, 7.3	Patch available	CNA

Linux VendorLinux Affected 6.6.84 to before 6.6.160; 6.12.20 to before 6.12.114; 6.13.8 to before 6.14 Fixed in 6.6.160, 6.12.114, 6.14 Patch available CNA
Linux VendorLinux Affected 6.14 and later Fixed in 6.6.160, 6.12.114, 7.2.6, 7.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	—	—	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.114, 6.14
Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.114, 7.2.6, 7.3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 4	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 5	Affected	No fix yet: Fix deferred

Not affected: 5 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat OpenShift Container Platform 4

Timeline

2026-10-02 Threatist record created from CVE-2026-90256
2026-10-03 Alias added: GHSA-323m-rj3w-9jqp
2026-10-15 Affected versions changed · Red Hat
2026-10-15 CVSS score added · Red Hat
2026-10-19 Fix available: Linux/[email protected] · CNA
2026-10-21 Fix available: Linux/Linux@0fa448369c87e20b2aeaeaca0187d698dd61f791, Linux/[email protected], Linux/[email protected] +1 · CNA
2026-10-21 2 new references · CNA
2026-10-23 Affected versions changed · Red Hat
2026-10-23 CVSS score changed · Red Hat
2026-10-29 Affected versions changed · Red Hat
2026-11-06 Affected versions changed · Red Hat

References

Other 4

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4

See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences