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: L2CAP: Validating the PDU length before reading the SDU length in l2capecreddatarcv The l2capecreddatarcv function reads the SDU length field from skb-data using getunalignedle16, without first verifying that skb...

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...

CVE-2026-74508

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: HIDP: reject frames without a transaction header hidprecvctrlframe and hidprecvintrframe read skb-data0 before checking that the L2CAP SDU contains a transaction header. A connected HIDP peer can send an empty basic-mo...

CVE-2026-53253: Out-of-bounds Read

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: reject short frames before parsing A BNEP peer can send a short BNEP SDU. bneprxframe reads the packet type byte immediately and, for control packets, reads the control opcode and setup UUID-size byte before...

CVE-2026-10658 Out-of-bounds access in Bluetooth ISO receive (`bt_iso_recv`) due to missing SDU-header length validation

btisorecv in subsys/bluetooth/host/iso.c pulled the ISO SDU header 4 bytes or, when the timestamp flag is set, the timestamped SDU header 8 bytes from the inbound HCI ISO Data buffer via netbufpullmem without first checking buf-len. The upstream hciiso handler enforces buf-len == the...

CVE-2026-10658

CVE-2026-10658 affects Zephyr’s Bluetooth Host ISO RX path, specifically bt_iso_recv() in subsys/bluetooth/host/iso.c. The vulnerability arises from missing minimum length checks for SDU headers when processing PB=START/SINGLE, allowing a malformed HCI ISO payload to bypass the inner header lengt...

CVE-2026-10658 Out-of-bounds access in Bluetooth ISO receive (`bt_iso_recv`) due to missing SDU-header length validation

btisorecv in subsys/bluetooth/host/iso.c pulled the ISO SDU header 4 bytes or, when the timestamp flag is set, the timestamped SDU header 8 bytes from the inbound HCI ISO Data buffer via netbufpullmem without first checking buf-len. The upstream hciiso handler enforces buf-len == the...

CVE-2026-10658 Out-of-bounds access in Bluetooth ISO receive (`bt_iso_recv`) due to missing SDU-header length validation

btisorecv in subsys/bluetooth/host/iso.c pulled the ISO SDU header 4 bytes or, when the timestamp flag is set, the timestamped SDU header 8 bytes from the inbound HCI ISO Data buffer via netbufpullmem without first checking buf-len. The upstream hciiso handler enforces buf-len == the...

CVE-2026-5068

A remote, unauthenticated BLE peer can trigger a 2-byte out-of-bounds write in the Bluetooth host during L2CAP LE CoC SDU reassembly. When the application enables segmentation via chanops.allocbuf and the chosen RX pool has a userdatasize smaller than 2 bytes, the segmentation counter stored in t...

CVE-2026-5068

A remote, unauthenticated BLE peer can trigger a 2-byte out-of-bounds write in the Bluetooth host during L2CAP LE CoC SDU reassembly. When the application enables segmentation via chanops.allocbuf and the chosen RX pool has a userdatasize smaller than 2 bytes, the segmentation counter stored in t...

CVE-2026-5068 bt: l2cap le coc: remote oob write via seg counter stored in net_buf user_data

A remote, unauthenticated BLE peer can trigger a 2-byte out-of-bounds write in the Bluetooth host during L2CAP LE CoC SDU reassembly. When the application enables segmentation via chanops.allocbuf and the chosen RX pool has a userdatasize smaller than 2 bytes, the segmentation counter stored in t...

Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv()

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SUSE CVE-2026-31512

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2capecreddatarcv l2capecreddatarcv reads the SDU length field from skb-data using getunalignedle16 without first verifying that skb contains at least...

EUVD-2026-24895

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2capecreddatarcv l2capecreddatarcv reads the SDU length field from skb-data using getunalignedle16 without first verifying that skb contains at least...

CVE-2026-31512

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2capecreddatarcv l2capecreddatarcv reads the SDU length field from skb-data using getunalignedle16 without first verifying that skb contains at least...

CVE-2026-31512 Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv()

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2capecreddatarcv l2capecreddatarcv reads the SDU length field from skb-data using getunalignedle16 without first verifying that skb contains at least...

CVE-2026-31512

Mode C CVE-2026-31512 affects the Linux kernel Bluetooth L2CAP path. The vulnerability arises in l2cap_ecred_data_rcv() where the SDU length is read from skb->data using get_unaligned_le16() without first ensuring skb contains at least 2 bytes (L2CAP_SDULEN_SIZE). If skb->len

CVE-2026-31498 Bluetooth: L2CAP: Fix ERTM re-init and zero pdu_len infinite loop

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix ERTM re-init and zero pdulen infinite loop l2capconfigreq processes CONFIGREQ for channels in BTCONNECTED state to support L2CAP reconfiguration e.g. MTU changes. However, since both CONFINPUTDONE and...

PT-2026-34403

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Bluetooth L2CAP component. The l2cap config req function processes CONFIG REQ for channels in BT CONNECTED state to support reconfiguration, such as MTU changes...

PT-2026-34417

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Bluetooth L2CAP component where the l2cap ecred data rcv function reads the SDU length field from skb-data using get unaligned le16 without verifying that the sock...