Astra Linux – Vulnerability in Linux 5.10, Linux

There are use-after-free vulnerabilities in the net/bluetooth/l2capcore.c files, specifically in the l2capconnect and l2capleconnectreq functions. These vulnerabilities may allow code execution and the leakage of kernel memory remotely via Bluetooth. A remote attacker can execute code that leaks...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: l2cap: Check the encryption key size during incoming connections. This is required for passing the GAP/SEC/SEM/BI-04-C PTS test case: - Security Mode: 4, Level: 4, Responder: Invalid Encryption Key Size - Key Size:...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Verify the payload length of L2CAPINFORSP before performing the read operation. The l2capinformationrsp function checks that cmdlen covers the fixed l2capinforsp header type + result, 4 bytes. However, it the...

Astra Linux – Vulnerability in Linux 5.10, Linux

A vulnerability, classified as critical, was discovered in the Linux kernel. The affected function is l2capconndel in the file net/bluetooth/l2capcore.c of the Bluetooth component. This vulnerability allows for exploitation after the memory allocation has been freed. It is recommended that patche...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: Fixed null-ptr-deref in l2capsockresumecb. syzbot reported null-ptr-deref in l2capsockresumecb. 0 l2capsockresumecb has a similar issue that was fixed in commit 1bff51ea59a9 “Bluetooth: fixed use-after-free errors i...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Fixed “use-after-free” issue This involves using l2capchanholdunlesszero after calling l2capgetchanblah to prevent the following error: Bluetooth: l2capcore.c: static void l2capchandestroystruct krefkref...

Astra Linux – Vulnerability in Linux 5.10, Linux

There is a known vulnerability in the l2capparseconfreq function of the Linux kernel’s net/bluetooth/l2capcore.c file, which can be exploited to remotely leak kernel pointers. We recommend upgrading to a later commit:...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: l2cap: fixed a nullptrderef in l2capchantimeout. There is a race condition between l2capchantimeout and l2capchandel. When we use l2capchandel to delete the channel, the chan-conn will be set to null. However, the...

Astra Linux – Vulnerability in Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Fixed a division by zero issue in l2capleflowctlinit. l2capleflowctlinit may cause both a division by zero and an integer overflow, as hdev-lemtu may not fall within the valid range. The MTU value was moved...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

A vulnerability classified as critical was discovered in the Linux kernel. The vulnerability affects the function l2capreassemblesdu in the file net/bluetooth/l2capcore.c of the Bluetooth component. This vulnerability stems from improper memory management, leading to an attempt to reuse freed...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fixed a memory leak in vhciwrite Syzkaller reported a memory leak as follows: ==================================== BUG: Memory leak Unreferenced object 0xffff88810d81ac00 size 240: ... Hex dump first 32 bytes: 0...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Fixed type confusion in l2capecredreconfrsp The function l2capecredreconfrsp casts the incoming data into the struct l2capecredconnrsp an ECRED connection response, 8 bytes long, with the result at offset 6,...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Fixed a nullptrderef issue in l2capsockreadycb. Before using a sk pointer, check if it is null. The following issues have also been fixed: KASAN: Nullptrderef in the range 0x0000000000000260-0x000000000000026...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Fixed a use-after-free caused by l2capreassemblesdu. Fixed a race condition between the following two processes that run parallelly: 1. l2capreassemblesdu - chan-ops-recv l2capsockrecvcb - sockqueuercvskb. 2...

kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp

A flaw was found in the Bluetooth L2CAP Logical Link Control and Adaptation Protocol component of the Linux kernel. When a device receives a connection response with an already-assigned destination Channel Identifier CID, the system may crash. This occurs because the kernel's procedure for...

CVE-2026-15460

The Bluetooth Classic BR/EDR L2CAP receive handler btl2capbrrecv in subsys/bluetooth/host/classic/l2capbr.c dispatched inbound data PDUs based only on the destination channel ID, without checking that the target channel had reached the BTL2CAPCONNECTED state. A dynamic channel is assigned its RX...

CVE-2026-15460 Missing channel-state validation in Zephyr Bluetooth Classic L2CAP receive path

The Bluetooth Classic BR/EDR L2CAP receive handler btl2capbrrecv in subsys/bluetooth/host/classic/l2capbr.c dispatched inbound data PDUs based only on the destination channel ID, without checking that the target channel had reached the BTL2CAPCONNECTED state. A dynamic channel is assigned its RX...

CVE-2026-15460 Missing channel-state validation in Zephyr Bluetooth Classic L2CAP receive path

The Bluetooth Classic BR/EDR L2CAP receive handler btl2capbrrecv in subsys/bluetooth/host/classic/l2capbr.c dispatched inbound data PDUs based only on the destination channel ID, without checking that the target channel had reached the BTL2CAPCONNECTED state. A dynamic channel is assigned its RX...

CVE-2026-15460

CVE-2026-15460 affects Zephyr RTOS Bluetooth Classic (BR/EDR) L2CAP, specifically the receive handler bt_l2cap_br_recv() in subsys/bluetooth/host/classic/l2cap_br.c. The handler dispatched inbound data PDUs based solely on the destination channel ID without verifying the channel had reached BT_L2...

EUVD-2026-75212

The Bluetooth Classic BR/EDR L2CAP receive handler btl2capbrrecv in subsys/bluetooth/host/classic/l2capbr.c dispatched inbound data PDUs based only on the destination channel ID, without checking that the target channel had reached the BTL2CAPCONNECTED state. A dynamic channel is assigned its RX...