diff --git a/meta-networking/recipes-support/strongswan/strongswan/CVE-2026-78123.patch b/meta-networking/recipes-support/strongswan/strongswan/CVE-2026-78123.patch
new file mode 100644
index 0000000000..36e6eb1289
--- /dev/null
+++ b/meta-networking/recipes-support/strongswan/strongswan/CVE-2026-78123.patch
@@ -0,0 +1,51 @@
+From 23707d346f1f85dba0419c43658a86a80a24f568 Mon Sep 17 00:00:00 2001
+From: Tobias Brunner <tobias@strongswan.org>
+Date: Mon, 1 Jun 2026 17:51:35 +0200
+Subject: [PATCH] openssl: Fix undefined memory access when verifying PKCS#7
+ containers
+
+If the signerInfo or recipientInfo structure doesn't contain
+issuerAndSerialNumber but instead a subjectKeyIdentifier, then the called
+functions will leave the passed name and serial numbers unchanged.  While
+openssl_x509_name2id() prevents a NULL-pointer dereference, it tries to
+DER-encode the object at the passed pointer via i2d_X509_NAME().
+Depending on the stack contents, this likely causes a segmentation fault.
+
+Fixes: 3c820cdc232a ("Implement PKCS#7 decryption using openssl")
+Fixes: c61723c69fb5 ("Implement OpenSSL PKCS#7 signed-data parsing and verification")
+Fixes: CVE-2026-78123
+
+CVE: CVE-2026-78123
+Upstream-Status: Backport [https://github.com/strongswan/strongswan/commit/e59b4c96990635a482d6532f7905143f2541d8b5]
+
+Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
+---
+ src/libstrongswan/plugins/openssl/openssl_pkcs7.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/libstrongswan/plugins/openssl/openssl_pkcs7.c b/src/libstrongswan/plugins/openssl/openssl_pkcs7.c
+index d9abcf8..b15c8d7 100644
+--- a/src/libstrongswan/plugins/openssl/openssl_pkcs7.c
++++ b/src/libstrongswan/plugins/openssl/openssl_pkcs7.c
+@@ -222,8 +222,8 @@ static auth_cfg_t *verify_signature(CMS_SignerInfo *si,
+ 	auth_cfg_t *auth, *found = NULL;
+ 	identification_t *issuer, *serial;
+ 	chunk_t attrs = chunk_empty, sig, attr;
+-	X509_NAME *name;
+-	ASN1_INTEGER *snr;
++	X509_NAME *name = NULL;
++	ASN1_INTEGER *snr = NULL;
+ 	int i;
+ 
+ 	if (CMS_SignerInfo_get0_signer_id(si, NULL, &name, &snr) != 1)
+@@ -628,8 +628,8 @@ static bool decrypt(private_openssl_pkcs7_t *this,
+ 			identification_t *serial, *issuer;
+ 			private_key_t *private;
+ 			X509_ALGOR *alg;
+-			X509_NAME *name;
+-			ASN1_INTEGER *sn;
++			X509_NAME *name = NULL;
++			ASN1_INTEGER *sn = NULL;
+ 			u_char zero = 0;
+ 			int oid;
+ 
diff --git a/meta-networking/recipes-support/strongswan/strongswan_6.0.6.bb b/meta-networking/recipes-support/strongswan/strongswan_6.0.6.bb
index d6176f000e..4d9fe14eb2 100644
--- a/meta-networking/recipes-support/strongswan/strongswan_6.0.6.bb
+++ b/meta-networking/recipes-support/strongswan/strongswan_6.0.6.bb
@@ -10,6 +10,7 @@ DEPENDS:append = "${@bb.utils.contains('DISTRO_FEATURES', 'tpm2', '  tpm2-tss',
 
 SRC_URI = "https://download.strongswan.org/strongswan-${PV}.tar.bz2 \
            file://CVE-2026-47895.patch \
+           file://CVE-2026-78123.patch \
 "
 
 SRC_URI[sha256sum] = "07df7cedae56a7f3bb07e66d21a1f9f87e961db70e99184e11d3819413e4f87c"