Bestechic BES2300 Bluetooth Audio SoC Heap Buffer Overflow DoS

The vulnerability of the avrcpindicateprocessdataind function in the microprogramming-based audio chipset of Bestechnic BES2300 Bluetooth Audio SoC is related to buffer overflow attacks. Exploiting this vulnerability could allow an attacker to cause a service failure by sending a specially crafte...

Bestechnic BES2300 Bluetooth Audio SoC Buffer Overflow DoS

The vulnerability of the l2caphandledata function in the microprogramming-based audio chipset of Bestechnic BES2300 Bluetooth Audio SoC is related to insufficient validation of input data. Exploiting this vulnerability could allow an attacker to trigger a service failure by sending a specially...

Bestechic BES2300 Bluetooth Audio SoC Buffer Overflow DoS

The vulnerability of the btmaclhandle function in Bestechnic BES2300 Bluetooth Audio SoC microprogramming software is related to a numerical overflow issue. Exploiting this vulnerability could allow an attacker to cause a service failure by sending a specially crafted L2CAP packet...

K000164083: Linux kernel vulnerability CVE-2026-53071

Security Advisory Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2capecredreconfrsp l2capecredreconfrsp calls l2capchandel without holding l2capchanlock. Every other l2capchandel caller in the file acquires the lock firs...

CVE-2026-99239

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...

CVE-2026-99239

A flaw was found in the Linux kernel's Bluetooth Logical Link Control and Adaptation Protocol L2CAP subsystem. A race condition between concurrent socket bind and connect operations allows a communication channel to be attached to a connection multiple times. A local attacker can exploit this fla...

DEBIAN-CVE-2026-99239

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...

CVE-2026-99239

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...

CVE-2026-99239

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...

EUVD-2026-115281

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...

CVE-2026-99239 Bluetooth: L2CAP: refuse __l2cap_chan_add if chan already has conn

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...

CVE-2026-99239

A TOCTOU race condition in the Linux kernel Bluetooth L2CAP component allows the l2cap_chan to be linked to l2cap_conn more than once, violating internal invariants. This occurs because l2cap_sock_connect() fails to check sk->sk_state, and l2cap_sock_bind() lacks sufficient locking for chan-&g...

CVE-2026-99239 Bluetooth: L2CAP: refuse __l2cap_chan_add if chan already has conn

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...

Astra Linux – vulnerability in linux-6.1

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: do not add sk to the parent socket’s accept queue unless BTLISTEN is set. The new sk should not be added to the parent socket’s accept queue after last l2capsockcleanuplisten has been executed in...

Astra Linux – vulnerability in linux-6.1

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...

Astra Linux – vulnerability in linux-6.1

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix slab-use-after-free in l2capconnect Extend a critical section to prevent chan from early freeing. Also make the l2capconnect return type void. Nothing is using the returned value but it is ugly to return a...

Astra Linux – vulnerability in linux-6.1

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...

PT-2026-135528

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.10.273 Linux kernel versions prior to 5.15.224 Description A race condition exists in the Bluetooth L2CAP channel setup. A local user can trigger a Time-of-Check to Time-of-Use TOCTOU race by racing socket bind...

Linux Distros Unpatched Vulnerability : CVE-2026-99239

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg...

CVE-2026-99239: Linux: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse __l2cap_chan_add if chan…

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse l2capchanadd if chan already has conn l2capchan may be linked to l2capconn at most once. This is assumed in several places, eg l2capchandel cleanup. There is a TOCTOU race where the invariant is violated:...