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...

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

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

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-2026-11809

The UpdateHub OTA client in subsys/mgmt/updatehub/updatehub.c contains an out-of-bounds / uninitialized-memory read in zimplupdatehubprobe. The probe response from the UpdateHub server is copied into a heap buffer metadata that is correctly NUL-terminated, but a second buffer metadatacopy is...

CVE-2026-11810

The UpdateHub firmware-update agent's probe handler zimplupdatehubprobe in subsys/mgmt/updatehub/updatehub.c parses the JSON metadata returned by the update server into a fixed two-level nested-array struct. After parsing it validates only the outer array length objectslen != 2 and then...

CVE-2026-11809: Out-of-bounds Read

The UpdateHub OTA client in subsys/mgmt/updatehub/updatehub.c contains an out-of-bounds / uninitialized-memory read in zimplupdatehubprobe. The probe response from the UpdateHub server is copied into a heap buffer metadata that is correctly NUL-terminated, but a second buffer metadatacopy is...

CVE-2026-11810: NULL Pointer Dereference

The UpdateHub firmware-update agent's probe handler zimplupdatehubprobe in subsys/mgmt/updatehub/updatehub.c parses the JSON metadata returned by the update server into a fixed two-level nested-array struct. After parsing it validates only the outer array length objectslen != 2 and then...