CVE-2026-90092 Bluetooth: L2CAP: reject accept queue add unless BT_LISTEN

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: reject accept queue add unless BTLISTEN New sk should not be added to parent socket accept queue after last l2capsockcleanuplisten has run in l2capsockteardowncb and state set to BTCLOSED, as that can result to...

CVE-2026-90093

CVE-2026-90093 is a use-after-free bug in the Linux kernel Bluetooth L2CAP subsystem. Since commit b66774b48dd9, l2cap_chan::conn retains a reference that remains non-NULL even after the corresponding hci_conn is deleted. Accessing fields such as hci_conn::hdev in this state causes a KASAN crash ...

CVE-2026-90091 Bluetooth: L2CAP: fix race l2cap_sock_cleanup_listen() vs. put_chan

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix race l2capsockcleanuplisten vs. putchan For L2CAP sockets without owning sk-sksocket, reading l2cappisk-chan may race against concurrent l2capsockkill - l2capsockputchan. This excludes simultaneous protoops...

PT-2026-94440

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A Use-After-Free UAF issue exists in the Bluetooth L2CAP implementation. The problem occurs because a new socket may be added to the parent socket accept queue after the l2cap sock clean...

CVE-2026-90092: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: reject accept queue add unless BTLISTEN New sk should not be added to parent socket accept queue after last l2capsockcleanuplisten has run in l2capsockteardowncb and state set to BTCLOSED, as that can result to...

PT-2026-94441

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Bluetooth L2CAP implementation where l2cap chan::conn retains a reference and remains non-NULL even after the associated hci conn is deleted. Accessing fields such...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Handling of NULL sock pointer in l2capsockalloc A NULL sock pointer is passed into l2capsockalloc when it is called from l2capsocknewconnectioncb. Error handling mechanisms should also take this into account. A...

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 vulnerability has been resolved: Bluetooth: L2CAP – Fixed issue where multiple L2CAPECREDCONNREQUESTs were accepted. Currently, the code attempts to accept requests regardless of the command identifier. This can result in multiple requests being marked as pendin...

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 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 found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Fixed an infinite loop caused by re-initializing ERTM and setting pdulen to zero. The l2capconfigreq function processes CONFIGREQ for channels in the BTCONNECTED state to support L2CAP reconfiguration e.g., M...

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 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...

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...

kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

A flaw was found in the Linux kernel's Bluetooth Logical Link Control and Adaptation Protocol L2CAP implementation. A remote Bluetooth Low Energy BLE device can exploit this by sending a specially crafted L2CAP ECRED reconfiguration response. This can lead to the corruption of the channel list,...

kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

A flaw was found in the Linux kernel's Bluetooth Logical Link Control and Adaptation Protocol L2CAP implementation. A remote Bluetooth Low Energy BLE device can exploit this by sending a specially crafted L2CAP ECRED reconfiguration response. This can lead to the corruption of the channel list,...

PT-2026-89182

The Bluetooth Classic BR/EDR L2CAP receive handler bt l2cap br recv in subsys/bluetooth/host/classic/l2cap br.c dispatched inbound data PDUs based only on the destination channel ID, without checking that the target channel had reached the BT L2CAP CONNECTED state. A dynamic channel is assigned i...

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...

MiracleLinux 9 : kernel-5.14.0-687.29.1.el9_8 (AXSA:2026-1758:73)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1758:73 advisory. kernel: crypto: afalg - zero initialize memory allocated via sockkmalloc CVE-2025-71113 kernel: scsi: core: Wake up the error handler when final...