diff --git a/package/strongswan/0002-fix-cve-2026-25075.patch b/package/strongswan/0002-fix-cve-2026-25075.patch
new file mode 100644
index 0000000000..82e07fba3f
--- /dev/null
+++ b/package/strongswan/0002-fix-cve-2026-25075.patch
@@ -0,0 +1,48 @@
+From d4b3c39776f06948d875614a0eddea9561159f2a Mon Sep 17 00:00:00 2001
+From: Tobias Brunner <tobias@strongswan.org>
+Date: Thu, 5 Mar 2026 12:43:12 +0100
+Subject: [PATCH] eap-ttls: Prevent crash if AVP length header field is invalid
+
+The length field in the AVP header includes the 8 bytes of the header
+itself.  Not checking for that and later subtracting it causes an
+integer underflow that usually triggers a crash when accessing a
+NULL pointer that resulted from the failing chunk_alloc() call because
+of the high value.
+
+The attempted allocations for invalid lengths (0-7) are 0xfffffff8,
+0xfffffffc, or 0x100000000 (0 on 32-bit hosts), so this doesn't result
+in a buffer overflow even if the allocation succeeds.
+
+Fixes: 79f2102cb442 ("implemented server side support for EAP-TTLS")
+CVE: CVE-2026-25075
+Upstream: https://download.strongswan.org/security/CVE-2026-25075/
+Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>
+---
+ src/libcharon/plugins/eap_ttls/eap_ttls_avp.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c b/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c
+index 06389f7ca73e..2983bd021ded 100644
+--- a/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c
++++ b/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c
+@@ -119,7 +119,7 @@ METHOD(eap_ttls_avp_t, process, status_t,
+ 		chunk_free(&this->input);
+ 		this->inpos = 0;
+ 
+-		if (!success)
++		if (!success || avp_len < AVP_HEADER_LEN)
+ 		{
+ 			DBG1(DBG_IKE, "received invalid AVP header");
+ 			return FAILED;
+@@ -130,7 +130,7 @@ METHOD(eap_ttls_avp_t, process, status_t,
+ 			return FAILED;
+ 		}
+ 		this->process_header = FALSE;
+-		this->data_len = avp_len - 8;
++		this->data_len = avp_len - AVP_HEADER_LEN;
+ 		this->input = chunk_alloc(this->data_len + (4 - avp_len) % 4);
+ 	}
+ 
+-- 
+2.43.0
+
diff --git a/package/strongswan/strongswan.mk b/package/strongswan/strongswan.mk
index b79ab83c42..c2fb0eef44 100644
--- a/package/strongswan/strongswan.mk
+++ b/package/strongswan/strongswan.mk
@@ -14,6 +14,8 @@ STRONGSWAN_DEPENDENCIES = host-pkgconf
 STRONGSWAN_INSTALL_STAGING = YES
 # 0001-eap_mschapv2_failure_request_len.patch
 STRONGSWAN_IGNORE_CVES += CVE-2025-62291
+# 0002-fix-cve-2026-25075.patch
+STRONGSWAN_IGNORE_CVES += CVE-2026-25075
 STRONGSWAN_CONF_OPTS += \
 	--without-lib-prefix \
 	--enable-led \