CVE-2026-10774

Zephyr's Bluetooth Mesh subnet key management leaks one PSA Crypto key slot on every subnet-key teardown. In subsys/bluetooth/mesh/subnet.c, netkeyscreate imports the Private Beacon Key into a PSA key slot under CONFIGBTMESHPRIVBEACONS enabled by default, but subnetkeysdestroy guarded the matchin...

CVE-2026-2411 Bluetooth GATT notify/indicate enforces the wrong attribute's permissions, bypassing encryption/authentication requirements on characteristic values

Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Characteristic Declaration whose permission is hard-coded to BTGATTPERMREAD, and a Characteristic Value attribute that carries the application-specified security permissions e.g. BTGATTPERMREADENCRYPT /...

EUVD-2026-51869

Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Characteristic Declaration whose permission is hard-coded to BTGATTPERMREAD, and a Characteristic Value attribute that carries the application-specified security permissions e.g. BTGATTPERMREADENCRYPT /...

CVE-2026-2411 Bluetooth GATT notify/indicate enforces the wrong attribute's permissions, bypassing encryption/authentication requirements on characteristic values

Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Characteristic Declaration whose permission is hard-coded to BTGATTPERMREAD, and a Characteristic Value attribute that carries the application-specified security permissions e.g. BTGATTPERMREADENCRYPT /...

PT-2026-67194

Name of the Vulnerable Software and Affected Versions Zephyr affected versions not specified Description Zephyr's Bluetooth host incorrectly handles security permission checks when sending notifications or indications. When a Characteristic Declaration attribute is used, the host evaluates the...

CVE-2026-10686

Zephyr's IPv6 forwarding path re-sent routed unicast packets without ever decrementing the IPv6 hop limit. Both routing branches of ipv6routepacket subsys/net/ip were affected: the explicit-route path netroutepacket and the on-link cross-interface path netroutepacketif. Each set the packet...

CVE-2026-10686

Zephyr IPv6 forwarding path has a bug where hop-limit is not decremented in both ipv6_route_packet() branches (explicit-route net_route_packet() and on-link net_route_packet_if()). This causes routed unicast packets to be forwarded indefinitely, enabling a potential on-path attacker to induce a p...

CVE-2026-10686 Missing hop-limit decrement on IPv6 forwarding path allows unbounded packet looping (DoS) in Zephyr routers

Zephyr's IPv6 forwarding path re-sent routed unicast packets without ever decrementing the IPv6 hop limit. Both routing branches of ipv6routepacket subsys/net/ip were affected: the explicit-route path netroutepacket and the on-link cross-interface path netroutepacketif. Each set the packet...

CVE-2026-10686 Missing hop-limit decrement on IPv6 forwarding path allows unbounded packet looping (DoS) in Zephyr routers

Zephyr's IPv6 forwarding path re-sent routed unicast packets without ever decrementing the IPv6 hop limit. Both routing branches of ipv6routepacket subsys/net/ip were affected: the explicit-route path netroutepacket and the on-link cross-interface path netroutepacketif. Each set the packet...

CVE-2026-10685

The Zephyr Bluetooth GATT client CCC-write response handler gattwritecccrsp in subsys/bluetooth/host/gatt.c invoked the application's params-subscribe callback after it had already called params-notifyconn, params, NULL, 0. Per the public GATT API, a notify callback with NULL data is the document...

CVE-2026-10685 Use-after-free of GATT subscribe params in Bluetooth host CCC-write response handler

The Zephyr Bluetooth GATT client CCC-write response handler gattwritecccrsp in subsys/bluetooth/host/gatt.c invoked the application's params-subscribe callback after it had already called params-notifyconn, params, NULL, 0. Per the public GATT API, a notify callback with NULL data is the document...

CVE-2026-10685

CVE-2026-10685 : In Zephyr, the GATT client CCC-write response handler gatt_write_ccc_rsp() may call the application’s params->subscribe() after already invoking params->notify(conn, params, NULL, 0). A NULL data notify signals termination; calling subscribe() on the same bt_gatt_subscribe_...

CVE-2026-10684

In subsys/debug/coredump/coredumpshell.c, printcoredumphdr used the 16-bit tgtcode field of a stored Zephyr coredump header directly as an index into coredumptargetcode2str, a fixed 7-element array of string pointers, with no bounds check. A stored coredump whose tgtcode is = 7 causes an...

CVE-2026-10684 Out-of-bounds read in coredump shell when printing stored-dump target code

In subsys/debug/coredump/coredumpshell.c, printcoredumphdr used the 16-bit tgtcode field of a stored Zephyr coredump header directly as an index into coredumptargetcode2str, a fixed 7-element array of string pointers, with no bounds check. A stored coredump whose tgtcode is = 7 causes an...

CVE-2026-10682 Out-of-bounds write in Zephyr `log_filter_set` syscall verifier reachable from userspace

The userspace verifier zvrfylogfilterset for the logfilterset syscall in subsys/logging/logmgmt.c performed a signed comparison against the int16t srcid parameter: srcid int16tlogsrccntgetdomainid. Any negative value for srcid e.g. -1 trivially satisfied this check and was forwarded into...

CVE-2026-10682 Out-of-bounds write in Zephyr `log_filter_set` syscall verifier reachable from userspace

The userspace verifier zvrfylogfilterset for the logfilterset syscall in subsys/logging/logmgmt.c performed a signed comparison against the int16t srcid parameter: srcid int16tlogsrccntgetdomainid. Any negative value for srcid e.g. -1 trivially satisfied this check and was forwarded into...

CVE-2026-10682

The CVE-2026-10682 entry describes an OOB read and subsequent memory-write in Zephyr’s log_filter_set syscall verifier due to a signed comparison: src_id < (int16_t)log_src_cnt_get(domain_id). Negative src_id values (e.g., -1) pass the check after sign-extension and are used as an unsigned ind...

CVE-2026-10682

The userspace verifier zvrfylogfilterset for the logfilterset syscall in subsys/logging/logmgmt.c performed a signed comparison against the int16t srcid parameter: srcid int16tlogsrccntgetdomainid. Any negative value for srcid e.g. -1 trivially satisfied this check and was forwarded into...

CVE-2026-10681

In Zephyr's userspace dynamic-objects subsystem, threadidxalloc in kernel/userspace/userspace.c allocated a new thread permission index from the global threadidxmap bitmap without holding listslock. On SMP systems, two user-mode threads invoking the kobjectallocKOBJTHREAD syscall concurrently can...

CVE-2026-10681

In Zephyr's userspace dynamic-objects subsystem, threadidxalloc in kernel/userspace/userspace.c allocated a new thread permission index from the global threadidxmap bitmap without holding listslock. On SMP systems, two user-mode threads invoking the kobjectallocKOBJTHREAD syscall concurrently can...