diff --git a/meta-oe/recipes-benchmark/iperf3/iperf3/CVE-2025-54349.patch b/meta-oe/recipes-benchmark/iperf3/iperf3/CVE-2025-54349.patch
new file mode 100644
index 0000000000..fbba42b04b
--- /dev/null
+++ b/meta-oe/recipes-benchmark/iperf3/iperf3/CVE-2025-54349.patch
@@ -0,0 +1,98 @@
+From 505181fd31501027460eb518d7e4d46498e048f5 Mon Sep 17 00:00:00 2001
+From: Sarah Larsen <swlarsen@es.net>
+Date: Wed, 25 Jun 2025 15:11:03 +0000
+Subject: [PATCH] Fix off-by-one heap overflow in auth.
+
+Reported by Han Lee (Apple Information Security)
+CVE-2025-54349
+
+CVE: CVE-2025-54349
+Upstream-Status: Backport [https://github.com/esnet/iperf/commit/42280d2292ed5f213bfcb33b2206ebcdb151ae66]
+
+Signed-off-by: Jinfeng Wang <jinfeng.wang.cn@windriver.com>
+---
+ src/iperf_auth.c | 18 +++++++++++++-----
+ 1 file changed, 13 insertions(+), 5 deletions(-)
+
+diff --git a/src/iperf_auth.c b/src/iperf_auth.c
+index 72e85fc..86b4eba 100644
+--- a/src/iperf_auth.c
++++ b/src/iperf_auth.c
+@@ -288,6 +288,7 @@ int encrypt_rsa_message(const char *plaintext, EVP_PKEY *public_key, unsigned ch
+ }
+ 
+ int decrypt_rsa_message(const unsigned char *encryptedtext, const int encryptedtext_len, EVP_PKEY *private_key, unsigned char **plaintext, int use_pkcs1_padding) {
++    int ret =0;
+ #if OPENSSL_VERSION_MAJOR >= 3
+     EVP_PKEY_CTX *ctx;
+ #else
+@@ -310,7 +311,8 @@ int decrypt_rsa_message(const unsigned char *encryptedtext, const int encryptedt
+     keysize = RSA_size(rsa);
+ #endif
+     rsa_buffer  = OPENSSL_malloc(keysize * 2);
+-    *plaintext = (unsigned char*)OPENSSL_malloc(keysize);
++    // Note: +1 for NULL
++    *plaintext = (unsigned char*)OPENSSL_malloc(keysize + 1);
+ 
+     BIO *bioBuff   = BIO_new_mem_buf((void*)encryptedtext, encryptedtext_len);
+     rsa_buffer_len = BIO_read(bioBuff, rsa_buffer, keysize * 2);
+@@ -320,13 +322,15 @@ int decrypt_rsa_message(const unsigned char *encryptedtext, const int encryptedt
+         padding = RSA_PKCS1_PADDING;
+     }
+ #if OPENSSL_VERSION_MAJOR >= 3
++
+     plaintext_len = keysize;
+     EVP_PKEY_decrypt_init(ctx);
+-    int ret = EVP_PKEY_CTX_set_rsa_padding(ctx, padding);
++
++    ret = EVP_PKEY_CTX_set_rsa_padding(ctx, padding);
+     if (ret < 0){
+         goto errreturn;
+     }
+-    EVP_PKEY_decrypt(ctx, *plaintext, &plaintext_len, rsa_buffer, rsa_buffer_len);
++    ret = EVP_PKEY_decrypt(ctx, *plaintext, &plaintext_len, rsa_buffer, rsa_buffer_len);
+     EVP_PKEY_CTX_free(ctx);
+ #else
+     plaintext_len = RSA_private_decrypt(rsa_buffer_len, rsa_buffer, *plaintext, rsa, padding);
+@@ -337,7 +341,7 @@ int decrypt_rsa_message(const unsigned char *encryptedtext, const int encryptedt
+     BIO_free(bioBuff);
+ 
+     /* Treat a decryption error as an empty string. */
+-    if (plaintext_len < 0) {
++    if (plaintext_len <= 0) {
+         plaintext_len = 0;
+     }
+ 
+@@ -386,24 +390,28 @@ int decode_auth_setting(int enable_debug, const char *authtoken, EVP_PKEY *priva
+     int plaintext_len;
+     plaintext_len = decrypt_rsa_message(encrypted_b64, encrypted_len_b64, private_key, &plaintext, use_pkcs1_padding);
+     free(encrypted_b64);
+-    if (plaintext_len < 0) {
++    if (plaintext_len <= 0) {
+         return -1;
+     }
++
+     plaintext[plaintext_len] = '\0';
+ 
+     char *s_username, *s_password;
+     s_username = (char *) calloc(plaintext_len, sizeof(char));
+     if (s_username == NULL) {
++        OPENSSL_free(plaintext);
+ 	return -1;
+     }
+     s_password = (char *) calloc(plaintext_len, sizeof(char));
+     if (s_password == NULL) {
++        OPENSSL_free(plaintext);
+ 	free(s_username);
+ 	return -1;
+     }
+ 
+     int rc = sscanf((char *) plaintext, auth_text_format, s_username, s_password, &utc_seconds);
+     if (rc != 3) {
++        OPENSSL_free(plaintext);
+ 	free(s_password);
+ 	free(s_username);
+ 	return -1;
+-- 
+2.49.0
+
diff --git a/meta-oe/recipes-benchmark/iperf3/iperf3_3.18.bb b/meta-oe/recipes-benchmark/iperf3/iperf3_3.18.bb
index 77b441e506..4e9f5f1f46 100644
--- a/meta-oe/recipes-benchmark/iperf3/iperf3_3.18.bb
+++ b/meta-oe/recipes-benchmark/iperf3/iperf3_3.18.bb
@@ -16,6 +16,7 @@ SRC_URI = "git://github.com/esnet/iperf.git;branch=master;protocol=https \
            file://0002-Remove-pg-from-profile_CFLAGS.patch \
            file://0001-configure.ac-check-for-CPP-prog.patch \
            file://0001-fix-build-with-gcc-15.patch \
+           file://CVE-2025-54349.patch \
            "
 
 SRCREV = "2a2984488d6de8f7a2d1f5938e03ca7be57e227c"