CVE ID :CVE-2026-10848<\/p>\n
Published : Aug. 2, 2026, 5:16 p.m. | 35\u00a0minutes ago<\/p>\n
Description :The OCPP 1.6 client in subsys\/net\/lib\/ocpp parsed inbound WAMP RPC frames in parse_rpc_msg() (subsys\/net\/lib\/ocpp\/ocpp_j.c) using a hand-rolled helper, extract_string_field(), that copied the message’s uid and action fields with strncpy(out_buf, token + 1, outlen – 1) and then scanned the result with strchr(out_buf, ‘”‘). Because strncpy does not NUL-terminate the destination when the source is at least outlen – 1 (127) bytes long, the subsequent strchr reads past the 128-byte destination buffer into adjacent stack memory; if a ” byte is found beyond the buffer, a one-byte out-of-bounds NUL write also occurs. A related defect in extract_payload() runs strchr\/strrchr over the receive buffer, which may not be NUL-terminated when a maximal-length frame fills it.<\/p>\n
The parsed bytes come directly from the OCPP central-system server over a websocket: the reader thread fills recv_buf via websocket_recv_msg() and calls parse_rpc_msg() on each inbound DATA frame (subsys\/net\/lib\/ocpp\/ocpp.c). A malicious or compromised central server, or an on-path attacker (OCPP is commonly deployed over plain ws:\/\/), can send an RPC frame whose uid or action field is 127+ bytes with no closing quote, triggering the out-of-bounds access.<\/p>\n
The primary impact is a remotely triggerable denial of service: the unbounded scan can fault on an unmapped page, and the stray NUL write can corrupt adjacent stack state. The over-read data is not reflected to the peer, so disclosure is limited. The feature is EXPERIMENTAL and must be explicitly enabled (CONFIG_OCPP). The fix replaces the manual parser with the bounds-respecting json_mixed_arr_parse() and copies the extracted uid with an explicitly NUL-terminated buffer, eliminating both over-reads.<\/p>\n
Severity: 7.0 | HIGH<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID :CVE-2026-10848 Published : Aug. 2, 2026, 5:16 p.m. | 35\u00a0minutes ago Description :The OCPP 1.6 client in subsys\/net\/lib\/ocpp parsed inbound WAMP RPC frames in parse_rpc_msg() (subsys\/net\/lib\/ocpp\/ocpp_j.c) using a hand-rolled helper, extract_string_field(), that copied the message’s uid and action fields with strncpy(out_buf, token + 1, outlen – 1) and then scanned the result with …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82884","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82884"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82884\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}