> CVE-2025-20727: Mediatek Baseband Heap Overflow During Parsing SIP Authentication-Info Header

An attacker sending a malformed SIP message over VoLTE to a device with a Mediatek baseband can trigger the vulnerability described here. The impact is Heap Overflow in the baseband, triggered by malformed VoLTE message such as SIP INVITE or MESSAGE request. The vulnerability described in this advisory affected a wide range of Mediatek devices. This vulnerability is assigned CVE-2025-20725. Vulnerability Details char * inet_msg_mime_quote(char *str) { char *slash_or_quote_ptr; char *src; char *dst; char curr; char *src_following; slash_or_quote_ptr = strpbrk(str,"\\\""); src_following = str; dst = str; if (slash_or_quote_ptr != NULL) { while (src = src_following, curr = *src, curr != '\0') { src_following = src + 1; if (curr !