CVE-2026-72336 Bluetooth: 6lowpan: hold L2CAP conn across debugfs control

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: 6lowpan: hold L2CAP conn across debugfs control getl2capconn looks up an LE hciconn under hdev protection, but then drops that protection before reading hcon-l2capdata and before lowpancontrolwrite later dereferences...

CVE-2026-72336

CVE-2026-72336 — Linux kernel, Bluetooth 6lowpan L2CAP hold across debugfs control Root cause: get_l2cap_conn() looks up an LE hci_conn under hdev protection, then drops protection before reading hcon->l2cap_data and before lowpan_control_write() dereferences conn->hcon, allowing a disconne...

CVE-2026-72333

CVE-2026-72333 concerns a Linux kernel Bluetooth L2CAP TX identifier leak. The fix was to adjust ident allocation to use an IDA and ensure idents are released when responses arrive, but identifiers allocated for commands without responses (notably LE CREDITS) were not released, allowing exhaustio...

CVE-2026-72333 Bluetooth: L2CAP: fix tx ident leak for commands without a response

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix tx ident leak for commands without a response Commit 6c3ea155e5ee "Bluetooth: L2CAP: Fix not tracking outstanding TX ident" changed ident allocation to use an IDA, releasing idents in l2capputident when the...

CVE-2026-72333 Bluetooth: L2CAP: fix tx ident leak for commands without a response

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix tx ident leak for commands without a response Commit 6c3ea155e5ee "Bluetooth: L2CAP: Fix not tracking outstanding TX ident" changed ident allocation to use an IDA, releasing idents in l2capputident when the...

EUVD-2026-59232

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix tx ident leak for commands without a response Commit 6c3ea155e5ee "Bluetooth: L2CAP: Fix not tracking outstanding TX ident" changed ident allocation to use an IDA, releasing idents in l2capputident when the...

PT-2026-72992

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix UAF in l2cap le connect rsp l2cap le connect rsp obtains a channel via l2cap get chan by ident but neither holds a reference nor uses l2cap chan hold unless zero before locking and operating on it. A...

Linux Distros Unpatched Vulnerability : CVE-2026-72333

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Bluetooth: L2CAP: fix tx ident leak for commands without a response Commit 6c3ea155e5ee Bluetooth: L2CAP: Fix not tracking outstanding TX ident changed ident...

PT-2026-72524

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: 6lowpan: hold L2CAP conn across debugfs control get l2cap conn looks up an LE hci conn under hdev protection, but then drops that protection before reading hcon-l2cap data and before lowpan control write later...

PT-2026-72521

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix tx ident leak for commands without a response Commit 6c3ea155e5ee "Bluetooth: L2CAP: Fix not tracking outstanding TX ident" changed ident allocation to use an IDA, releasing idents in l2cap put ident when th...

Linux Distros Unpatched Vulnerability : CVE-2026-74540

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Bluetooth: L2CAP: fix UAF in l2capleconnectrsp l2capleconnectrsp obtains a channel via l2capgetchanbyident but neither holds a reference nor uses...

K000162910: Linux kernel vulnerability CVE-2026-53208

Security Advisory Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: reject BR/EDR signaling packets over MTUsig net/bluetooth/l2capcore.c:l2capsigchannel accepts BR/EDR signaling packets up to the channel MTU and dispatches each command without...

The vulnerabilities of the functions l2cap_register_user() and l2cap_unregister_user() in the net/bluetooth/l2cap_core.c module of the Linux kernel’s Bluetooth subsystem allow a malicious actor to cause service failures.

The vulnerability of the functions l2capregisteruser and l2capunregisteruser in the net/bluetooth/l2capcore.c module of the Linux kernel’s Bluetooth subsystem is related to synchronization errors when using shared resources. Exploiting this vulnerability could allow a attacker to cause service...

CVE-2026-64434

A flaw was found in the Linux kernel's Bluetooth L2CAP Logical Link Control and Adaptation Protocol component. An asynchronous operation in the l2capchantimeout function can attempt to access a connection that has already been deallocated. This use-after-free vulnerability could allow a local...

CVE-2026-64557

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free in l2capsocknewconnectioncb l2capsocknewconnectioncb returned l2cappisk-chan after releasesockparent. Once the parent lock is dropped the newly enqueued child socket sk is reachable via the...

CVE-2026-64557

Summary: CVE-2026-64557 affects the Linux kernel Bluetooth L2CAP implementation, causing a use-after-free during new Bluetooth connections. The bug occurs when l2cap_sock_new_connection_cb() returns the new channel after release_sock(parent); once the parent lock is dropped, the enqueued child so...

MiracleLinux 8 : kernel-4.18.0-553.146.1.el8_10 (AXSA:2026-1384:55)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1384:55 advisory. kernel: RDMA/mana: Remove user triggerable WARNON in manaibcreateqprss CVE-2026-46117 kernel: Bluetooth: l2cap: Add missing chan lock in...

SUSE CVE-2026-64434

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref l2capchantimeout runs asynchronously and accesses chan-conn. If the connection is torn down while the timer is running or pending, chan-conn can be freed, leading t...

CVE-2026-64403

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: validate option length before reading conf opt value l2capgetconfopt derives the option length from the attacker-controlled opt-len field and immediately dereferences opt-val as u8, getunalignedle16 or...

CVE-2026-64434

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref l2capchantimeout runs asynchronously and accesses chan-conn. If the connection is torn down while the timer is running or pending, chan-conn can be freed, leading t...