EUVD-2026-65292

The Zephyr ext2 filesystem driver fails to validate the slogblocksize field of the on-disk superblock when mounting a filesystem. ext2verifydisksuperblock in subsys/fs/ext2/ext2impl.c checks the magic number, revision, inode size and group counts, but never bounds slogblocksize. On a successful...

CVE-2026-13215 Zephyr ext2 mount: unvalidated superblock block size causes out-of-bounds write from a crafted filesystem image

The Zephyr ext2 filesystem driver fails to validate the slogblocksize field of the on-disk superblock when mounting a filesystem. ext2verifydisksuperblock in subsys/fs/ext2/ext2impl.c checks the magic number, revision, inode size and group counts, but never bounds slogblocksize. On a successful...

CVE-2026-13215 Zephyr ext2 mount: unvalidated superblock block size causes out-of-bounds write from a crafted filesystem image

The Zephyr ext2 filesystem driver fails to validate the slogblocksize field of the on-disk superblock when mounting a filesystem. ext2verifydisksuperblock in subsys/fs/ext2/ext2impl.c checks the magic number, revision, inode size and group counts, but never bounds slogblocksize. On a successful...

CVE-2026-13214

A stack buffer overflow in the Zephyr RTOS OCPP 1.6 client (subsys/net/lib/ocpp/ocpp_j.c, function parse_getconfig_msg()) results from an unbounded strcpy() of an attacker-controlled JSON "key" string into a fixed 50-byte stack buffer (skey[CISTR50]). The key is parsed from a GetConfiguration mes...

CVE-2026-13213

The Hearing Access Service HAS GATT server in subsys/bluetooth/audio/has.c installs a connection-callback set unconditionally via BTCONNCBDEFINE, so securitychanged runs for every connection that establishes security even before the application has called bthasregister. The service attribute...

CVE-2026-13213

Zephyr RTOS Bluetooth Hearing Access Service (HAS) GATT server (subsys/bluetooth/audio/has.c) contains a NULL-pointer dereference in security_changed(). The connection-callback set is installed unconditionally via BT_CONN_CB_DEFINE, so the callback fires before the application calls bt_has_regist...

CVE-2026-13213 Bluetooth HAS: NULL-pointer dereference DoS when a bonded peer reconnects before bt_has_register

The Hearing Access Service HAS GATT server in subsys/bluetooth/audio/has.c installs a connection-callback set unconditionally via BTCONNCBDEFINE, so securitychanged runs for every connection that establishes security even before the application has called bthasregister. The service attribute...

EUVD-2026-65003

The Hearing Access Service HAS GATT server in subsys/bluetooth/audio/has.c installs a connection-callback set unconditionally via BTCONNCBDEFINE, so securitychanged runs for every connection that establishes security even before the application has called bthasregister. The service attribute...

CVE-2026-13212

The Zephyr virtio driver does not validate the descriptor-chain head id that the virtio device writes into the used ring. In virtioisr drivers/virtio/virtiocommon.c, the device-written vq-used-ringidx.id is used directly as an index into vq-recvcbs and vq-desc, which are both allocated with exact...

EUVD-2026-64925

The Zephyr virtio driver does not validate the descriptor-chain head id that the virtio device writes into the used ring. In virtioisr drivers/virtio/virtiocommon.c, the device-written vq-used-ringidx.id is used directly as an index into vq-recvcbs and vq-desc, which are both allocated with exact...

CVE-2026-13212 Zephyr virtio driver calls an arbitrary function pointer from an out-of-range used-ring descriptor id

The Zephyr virtio driver does not validate the descriptor-chain head id that the virtio device writes into the used ring. In virtioisr drivers/virtio/virtiocommon.c, the device-written vq-used-ringidx.id is used directly as an index into vq-recvcbs and vq-desc, which are both allocated with exact...

CVE-2026-13212 Zephyr virtio driver calls an arbitrary function pointer from an out-of-range used-ring descriptor id

The Zephyr virtio driver does not validate the descriptor-chain head id that the virtio device writes into the used ring. In virtioisr drivers/virtio/virtiocommon.c, the device-written vq-used-ringidx.id is used directly as an index into vq-recvcbs and vq-desc, which are both allocated with exact...

CVE-2026-13212

The Zephyr RTOS virtio driver contains an out-of-bounds read in virtio_isr() (drivers/virtio/virtio_common.c). The device-written descriptor-chain head id from the used ring is used directly as an index into recv_cbs[] and desc[] without a bounds check. A malicious or compromised virtio backend (...

CVE-2026-13343

CVE-2026-13343 affects the Zephyr RTOS UMP Stream responder library (lib/midi2/ump_stream_responder.c). The functions make_endpoint_info() and make_function_block_info() declare a local struct midi_ump without initialisation, populating only the first two of four uint32_t words. The remaining two...

CVE-2026-9728 TOCTOU race in mbox_send syscall verifier allows userspace to leak kernel memory

The userspace syscall verifier zvrfymboxsend in drivers/mbox/mboxhandlers.c validated the nested msg-data/msg-size fields by reading them directly out of live userspace memory, and then forwarded the original, still-mutable userspace struct mboxmsg pointer to zimplmboxsend and the underlying...

CVE-2026-9728

CVE-2026-9728 is a time-of-check/time-of-use (TOCTOU) race condition in the Zephyr RTOS userspace mailbox subsystem. The syscall verifier z_vrfy_mbox_send() in drivers/mbox/mbox_handlers.c validates msg->data/msg->size by reading them directly from live userspace memory, then forwards the o...

CVE-2026-9728 TOCTOU race in mbox_send syscall verifier allows userspace to leak kernel memory

The userspace syscall verifier zvrfymboxsend in drivers/mbox/mboxhandlers.c validated the nested msg-data/msg-size fields by reading them directly out of live userspace memory, and then forwarded the original, still-mutable userspace struct mboxmsg pointer to zimplmboxsend and the underlying...

PT-2026-80901

The Zephyr virtio driver does not validate the descriptor-chain head id that the virtio device writes into the used ring. In virtio isr drivers/virtio/virtio common.c, the device-written vq-used-ringidx.id is used directly as an index into vq-recv cbs and vq-desc, which are both allocated with...

EUVD-2026-64597

The Infineon Airoc Wi-Fi driver's transmit callback airocmgmtsend in drivers/wifi/infineon/airocwifi.c allocates a netbuf from the fixed airocpool for every outbound packet. When whdnetworksendethernetdata returns a synchronous failure, the underlying WHD library does not take ownership of the...

CVE-2026-12634

The NVS backend of the Zephyr settings subsystem subsys/settings/src/settingsnvs.c reads stored setting-name entries into fixed 74-byte stack buffers and NUL-terminates them with bufrc = '\0', where rc is the return value of nvsread. Per its contract, nvsread returns the full stored entry length...