CVE-2026-76787

The UpdateHub firmware-over-the-air client parses the CoAP probe response with Zephyr's JSON library in zimplupdatehubprobe subsys/mgmt/updatehub/updatehub.c. The decoder treats every descriptor field as optional — jsonobjparse returns a bitmask of the fields it actually decoded and never fails o...

CVE-2026-76787

The UpdateHub firmware-over-the-air (FOTA) client in Zephyr is vulnerable to a NULL pointer dereference within the z_impl_updatehub_probe() function. The issue occurs because the JSON decoder treats the sha256sum field as optional; if a network peer omits this string in a CoAP probe response, the...

CVE-2026-76787 NULL pointer dereference in the UpdateHub FOTA client when probe metadata omits sha256sum

The UpdateHub firmware-over-the-air client parses the CoAP probe response with Zephyr's JSON library in zimplupdatehubprobe subsys/mgmt/updatehub/updatehub.c. The decoder treats every descriptor field as optional — jsonobjparse returns a bitmask of the fields it actually decoded and never fails o...

CVE-2026-76787 NULL pointer dereference in the UpdateHub FOTA client when probe metadata omits sha256sum

The UpdateHub firmware-over-the-air client parses the CoAP probe response with Zephyr's JSON library in zimplupdatehubprobe subsys/mgmt/updatehub/updatehub.c. The decoder treats every descriptor field as optional — jsonobjparse returns a bitmask of the fields it actually decoded and never fails o...

EUVD-2026-104599

The UpdateHub firmware-over-the-air client parses the CoAP probe response with Zephyr's JSON library in zimplupdatehubprobe subsys/mgmt/updatehub/updatehub.c. The decoder treats every descriptor field as optional — jsonobjparse returns a bitmask of the fields it actually decoded and never fails o...

CVE-2026-76787 NULL pointer dereference in the UpdateHub FOTA client when probe metadata omits sha256sum

The UpdateHub firmware-over-the-air client parses the CoAP probe response with Zephyr's JSON library in zimplupdatehubprobe subsys/mgmt/updatehub/updatehub.c. The decoder treats every descriptor field as optional — jsonobjparse returns a bitmask of the fields it actually decoded and never fails o...

CVE-2026-76787: NULL Pointer Dereference

The UpdateHub firmware-over-the-air client parses the CoAP probe response with Zephyr's JSON library in zimplupdatehubprobe subsys/mgmt/updatehub/updatehub.c. The decoder treats every descriptor field as optional — jsonobjparse returns a bitmask of the fields it actually decoded and never fails o...

PT-2026-117650

Name of the Vulnerable Software and Affected Versions UpdateHub affected versions not specified Description The UpdateHub firmware-over-the-air client contains a flaw in how it parses CoAP probe responses using the Zephyr JSON library within the z impl updatehub probe function. When a response...

Zephyr improper exception handling vulnerabilities

Versions of Zephyr from 2.4.0 to 4.5.0 had a vulnerability related to improper exception handling. This vulnerability arises from the UpdateHub firmware’s client for over-the-air downloads, which improperly resolves CoAP probe responses by referencing an empty pointer without verifying the missin...

CVE-2026-11812

The UpdateHub management subsystem subsys/mgmt/updatehub/updatehub.c drives every update operation through a single file-scope ctx structure that holds the CoAP block context, payload buffer, status code, socket, and a one-element poll-fd array fds1. Access to ctx was not serialized, and preparef...

CVE-2026-11811

The UpdateHub over-the-air update client's startcoapclient in subsys/mgmt/updatehub/updatehub.c leaks the CoAP/DTLS socket descriptor on its connection-setup failure paths. The shared error: cleanup gated socket closing on a ret 0 flag, but ret was set to -1 immediately after the socket was...

EUVD-2026-55855

The UpdateHub management subsystem subsys/mgmt/updatehub/updatehub.c drives every update operation through a single file-scope ctx structure that holds the CoAP block context, payload buffer, status code, socket, and a one-element poll-fd array fds1. Access to ctx was not serialized, and preparef...

CVE-2026-11812

The UpdateHub management subsystem subsys/mgmt/updatehub/updatehub.c drives every update operation through a single file-scope ctx structure that holds the CoAP block context, payload buffer, status code, socket, and a one-element poll-fd array fds1. Access to ctx was not serialized, and preparef...

CVE-2026-11812

The UpdateHub management subsystem subsys/mgmt/updatehub/updatehub.c drives every update operation through a single file-scope ctx structure that holds the CoAP block context, payload buffer, status code, socket, and a one-element poll-fd array fds1. Access to ctx was not serialized, and preparef...

CVE-2026-11812 UpdateHub: race condition on shared context causes out-of-bounds write and DoS

The UpdateHub management subsystem subsys/mgmt/updatehub/updatehub.c drives every update operation through a single file-scope ctx structure that holds the CoAP block context, payload buffer, status code, socket, and a one-element poll-fd array fds1. Access to ctx was not serialized, and preparef...

CVE-2026-11812

CVE-2026-11812 concerns the UpdateHub management subsystem (subsys/mgmt/updatehub/updatehub.c) where access to a single file-scope ctx structure is not serialized. The code allows two concurrent flows to mutate ctx (background autohandler and user-triggered operations), and prepare_fds() can writ...

CVE-2026-11812 UpdateHub: race condition on shared context causes out-of-bounds write and DoS

The UpdateHub management subsystem subsys/mgmt/updatehub/updatehub.c drives every update operation through a single file-scope ctx structure that holds the CoAP block context, payload buffer, status code, socket, and a one-element poll-fd array fds1. Access to ctx was not serialized, and preparef...

CVE-2026-11812 UpdateHub: race condition on shared context causes out-of-bounds write and DoS

The UpdateHub management subsystem subsys/mgmt/updatehub/updatehub.c drives every update operation through a single file-scope ctx structure that holds the CoAP block context, payload buffer, status code, socket, and a one-element poll-fd array fds1. Access to ctx was not serialized, and preparef...

CVE-2026-11811

The CVE-2026-11811 entry documents a socket-file-descriptor leak in the UpdateHub OTA client (start_coap_client) when connection-setup fails. The leak occurs because on failure paths the cleanup gate does not call cleanup_connection(), leaving an open descriptor in the global ctx.sock that is ove...

CVE-2026-11811

The UpdateHub over-the-air update client's startcoapclient in subsys/mgmt/updatehub/updatehub.c leaks the CoAP/DTLS socket descriptor on its connection-setup failure paths. The shared error: cleanup gated socket closing on a ret 0 flag, but ret was set to -1 immediately after the socket was...