CVE-2026-62381

luci-lib-px5g (LuCI) in OpenWrt contains a heap-based buffer overflow in the ASN.1 encoding routine asn1_add_obj (x509write.c) triggered when signing a certificate with a 2040-bit RSA key . The BIT STRING allocation is sized for a 255-byte signature's DER length encoding, but prepending the unuse...