EUVD-2026-65599

The Zephyr ext2 filesystem driver validates the on-disk block bitmap in ext2initfs subsys/fs/ext2/ext2impl.c by passing fsblocks = sblockscount - sfirstdatablock to ext2bitmapcountset. That helper subsys/fs/ext2/ext2bitmap.c treats its argument as a number of bits and reads one bitmap byte per...

CVE-2026-13217 NULL-pointer dereference in Zephyr OCPP CALLRESULT parsing via unchecked strtok_r/atoi

The OCPP 1.6 client in subsys/net/lib/ocpp/ocpp.c reconstructs a session handle and PDU id from the uid field of a CALLRESULT message. In ocppprocessservermsg the code calls atoistrtokruid, "-", &tmp without checking the strtokr return value. When the server-supplied uid is empty or contains no -...

CVE-2026-13217

The Zephyr RTOS OCPP 1.6 client in subsys/net/lib/ocpp/ocpp.c contains a NULL-pointer dereference in ocpp_process_server_msg(). When parsing the uid field of a CALLRESULT message, atoi(strtok_r(uid, "-", &tmp)) is called without checking whether strtok_r() returned NULL. A malicious or compromise...

EUVD-2026-65598

The OCPP 1.6 client in subsys/net/lib/ocpp/ocpp.c reconstructs a session handle and PDU id from the uid field of a CALLRESULT message. In ocppprocessservermsg the code calls atoistrtokruid, "-", &tmp without checking the strtokr return value. When the server-supplied uid is empty or contains no -...

CVE-2026-13217 NULL-pointer dereference in Zephyr OCPP CALLRESULT parsing via unchecked strtok_r/atoi

The OCPP 1.6 client in subsys/net/lib/ocpp/ocpp.c reconstructs a session handle and PDU id from the uid field of a CALLRESULT message. In ocppprocessservermsg the code calls atoistrtokruid, "-", &tmp without checking the strtokr return value. When the server-supplied uid is empty or contains no -...

EUVD-2026-65597

The virtio PCI driver drivers/virtio/virtiopci.c parses a device's PCI capability list during driver initialization. In virtiopcireadcap the device-supplied capability length byte caplen read from PCI config space via pcieconfread was only checked with asserttmp.caplen == capstructsize. That asse...

CVE-2026-13216

CVE-2026-13216 is an out-of-bounds stack write in the Zephyr RTOS virtio PCI driver (drivers/virtio/virtio_pci.c). The device-supplied cap_len field, read from PCI config space, was validated only by a compiled-out assert() (gated by CONFIG_ASSERT, off by default in production). The unvalidated l...

CVE-2026-13216 Out-of-bounds stack write in Zephyr virtio PCI driver from unvalidated device-supplied capability length

The virtio PCI driver drivers/virtio/virtiopci.c parses a device's PCI capability list during driver initialization. In virtiopcireadcap the device-supplied capability length byte caplen read from PCI config space via pcieconfread was only checked with asserttmp.caplen == capstructsize. That asse...

CVE-2026-13215

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...

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

The Zephyr RTOS ext2 filesystem driver fails to bounds-check the s_log_block_size field in ext2_verify_disk_superblock() (subsys/fs/ext2/ext2_impl.c). A crafted value causes the computed block size (1024 <

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...