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CVE-2026-45541

ESF-IDF: Remote Null Pointer Dereference in WebSocket Server PUBLISHED

Description (CNA)

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a NULL-pointer dereference exists in the WebSocket subprotocol-negotiation path of the esp_http_server component. While parsing the client-supplied Sec-WebSocket-Protocol request header during the WebSocket handshake, the tokenisation result is dereferenced without a NULL check, so a malformed header value can crash the server before any application-level authentication runs. This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.

Affected (CNA)

Vendor / productVersions
espressif / esp-idfaffected = 6.0; affected = 5.5.4; affected = 5.4.4; affected = 5.3.5; affected = 5.2.6

CWE

CWE-476

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.