CVE-2026-43069

A flaw was found in the Linux kernel's Bluetooth subsystem, specifically in the hcill component. A local user could exploit this vulnerability when the system attempts to download firmware. If the firmware content is invalid or empty after a successful request, the system fails to release the...

CVE-2026-43022

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hcisync: hcicmdsyncqueueonce return -EEXIST if exists hcicmdsyncqueueonce needs to indicate whether a queue item was added, so caller can know if callbacks are called, so it can avoid leaking resources. Change the...

CVE-2026-31771

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hcievent: move wake reason storage into validated event handlers hcistorewakereason is called from hcieventpacket immediately after stripping the HCI event header but before hcieventfunc enforces the per-event minimum...

USN-8180-4 linux-azure-fips vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - Block layer subsystem; - Drivers core; - Bluetooth drivers; - DMA engine subsystem; - GPU...

USN-8187-1 linux-nvidia-tegra, linux-nvidia-tegra-igx vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - Block layer subsystem; - Drivers core; - Bluetooth drivers; - DMA engine subsystem; - GPU...

USN-8180-2: Linux kernel (FIPS) vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - Block layer subsystem; - Drivers core; - Bluetooth drivers; - DMA engine subsystem; - GPU...

kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling

A flaw was found in the Linux kernel's Bluetooth subsystem. A use-after-free UAF vulnerability exists in the hcidisconnectallsync function. This can occur if a Bluetooth connection is deleted while a controller event is being processed concurrently. A local attacker could potentially exploit this...

kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling

A flaw was found in the Linux kernel's Bluetooth subsystem. A use-after-free UAF vulnerability exists in the hcidisconnectallsync function. This can occur if a Bluetooth connection is deleted while a controller event is being processed concurrently. A local attacker could potentially exploit this...

kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling

A flaw was found in the Linux kernel's Bluetooth subsystem. A use-after-free UAF vulnerability exists in the hcidisconnectallsync function. This can occur if a Bluetooth connection is deleted while a controller event is being processed concurrently. A local attacker could potentially exploit this...

kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling

A flaw was found in the Linux kernel's Bluetooth subsystem. A use-after-free UAF vulnerability exists in the hcidisconnectallsync function. This can occur if a Bluetooth connection is deleted while a controller event is being processed concurrently. A local attacker could potentially exploit this...

kernel: Linux kernel (CIFS): Use-after-free vulnerability allows data integrity compromise and denial of service

A flaw was found in the Linux kernel's Common Internet File System CIFS component. This use-after-free vulnerability occurs due to improper handling of server hostname information during connection re-establishment. An attacker on an adjacent network could exploit this, potentially leading to a...

The vulnerability of the `sco_sock_kill()` function in the `net/bluetooth/sco.c` module of the Linux kernel’s Bluetooth subsystem allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the scosockkill function in the net/bluetooth/sco.c module of the Linux Bluetooth subsystem is related to the reutilization of previously freed memory. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and accessibility of the...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-001417)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001417 advisory. A use-after-free flaw was found in the Linux kernels Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race...

kernel: Bluetooth: hci_event: Fix UAF in hci_acl_create_conn_sync

A flaw was found in the Linux kernel’s Bluetooth subsystem HCI. Specifically, in the function hciaclcreateconnsync and related path hcilecreateconnsync, a connection object in state BTOPEN that is still pending command submission may be freed prematurely, leading to a use-after-free condition. An...

kernel: Bluetooth: hci_event: Fix UAF in hci_acl_create_conn_sync

A flaw was found in the Linux kernel’s Bluetooth subsystem HCI. Specifically, in the function hciaclcreateconnsync and related path hcilecreateconnsync, a connection object in state BTOPEN that is still pending command submission may be freed prematurely, leading to a use-after-free condition. An...

kernel: Bluetooth: hci_event: Fix UAF in hci_acl_create_conn_sync

A flaw was found in the Linux kernel’s Bluetooth subsystem HCI. Specifically, in the function hciaclcreateconnsync and related path hcilecreateconnsync, a connection object in state BTOPEN that is still pending command submission may be freed prematurely, leading to a use-after-free condition. An...

CVE-2025-68306 Bluetooth: btusb: mediatek: Fix kernel crash when releasing mtk iso interface

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: mediatek: Fix kernel crash when releasing mtk iso interface When performing reset tests and encountering abnormal card drop issues that lead to a kernel crash, it is necessary to perform a null check before...

Ubuntu 22.04 LTS / 24.04 LTS : Linux kernel (Azure) vulnerabilities (USN-7935-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7935-1 advisory. Jean-Claude Graf, Sandro Regge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor...

USN-7935-1: Linux kernel (Azure) vulnerabilities

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this t...

kernel: Bluetooth: hci_event: Fix UAF in hci_conn_tx_dequeue

A flaw was discovered in the Bluetooth subsystem of the Linux kernel. When processing a HCIEVNUMCOMPPKTS event, the function hciconntxdequeue did not properly hold or release the hdev device lock, which may lead to a use-after-free of the connection structure...