From b8904599e36f463c5e337116a2dcbe47a1f03f63 Mon Sep 17 00:00:00 2001
From: BZO95 <deffie.jnkiee@gmail.com>
Date: Wed, 4 Feb 2026 17:05:30 +0800
Subject: [PATCH] crypto/ecies: fix panic on short ciphertext in symDecrypt

---
 crypto/ecies/ecies.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crypto/ecies/ecies.go b/crypto/ecies/ecies.go
index 378d764a19..213678c80e 100644
--- a/crypto/ecies/ecies.go
+++ b/crypto/ecies/ecies.go
@@ -221,6 +221,9 @@ func symDecrypt(params *ECIESParams, key, ct []byte) (m []byte, err error) {
 	if err != nil {
 		return
 	}
+	if len(ct) < params.BlockSize {
+		return nil, ErrInvalidMessage
+	}
 
 	ctr := cipher.NewCTR(c, ct[:params.BlockSize])