strongswan: patch CVE-2026-78127

Use patch[1] provided by strongSwan[2]

Details:
https://nvd.nist.gov/vuln/detail/cve-2026-78127

[1]https://download.strongswan.org/security/CVE-2026-78127/strongswan-5.3.1-6.0.7_message_log_leak.patch
[2]https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78127).html

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
Signed-off-by: Anuj Mittal <anuj.mittal@oss.qualcomm.com>
(cherry picked from commit 7b8fd4df2e)
Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>

meta-networking/recipes-support/strongswan/strongswan/CVE-2026-78127.patch

@@ -0,0 +1,115 @@
+From b38d55b7df137e599c0364a8f0e6d3e1ab84ed50 Mon Sep 17 00:00:00 2001
+From: Tobias Brunner <tobias@strongswan.org>
+Date: Mon, 8 Jun 2026 09:19:42 +0200
+Subject: [PATCH] message: Avoid memory leak if string buffer for message is
+ too small
+
+This leaked 40 or 80 bytes per parsed message for the enumerators that
+were not destroyed.  While triggering an OOM condition will require quite
+a lot of messages and the DoS protection also helps avoiding that this
+is triggered quickly, it all depends on the memory constraints of the
+system and the time available to the attacker.  Also, if IKEv1 is allowed,
+it could get quicker as the lack of message IDs doesn't allow dismissing
+unexpected messages before parsing them.
+
+Fixes: 092958c89d52 ("fixed payload debug message")
+Fixes: 6a4a47511f75 ("Show contents of the CP payload in message_t stringification")
+Fixes: CVE-2026-78127
+
+CVE: CVE-2026-78127
+Upstream-Status: Backport [https://github.com/strongswan/strongswan/commit/4b7108ac0f84fbf40da2b510eb6333afa2a54240]
+
+Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
+---
+ src/libcharon/encoding/message.c | 23 ++++++++++++-----------
+ 1 file changed, 12 insertions(+), 11 deletions(-)
+
+diff --git a/src/libcharon/encoding/message.c b/src/libcharon/encoding/message.c
+index 8da9a1d..a4bf9cb 100644
+--- a/src/libcharon/encoding/message.c
++++ b/src/libcharon/encoding/message.c
+@@ -1398,7 +1398,7 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 						   payload->get_type(payload));
+ 		if (written >= len || written < 0)
+ 		{
+-			return buf;
++			goto err;
+ 		}
+ 		pos += written;
+ 		len -= written;
+@@ -1424,7 +1424,7 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 			}
+ 			if (written >= len || written < 0)
+ 			{
+-				return buf;
++				goto err;
+ 			}
+ 			pos += written;
+ 			len -= written;
+@@ -1454,7 +1454,7 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 							   eap->get_code(eap), method);
+ 			if (written >= len || written < 0)
+ 			{
+-				return buf;
++				goto err;
+ 			}
+ 			pos += written;
+ 			len -= written;
+@@ -1495,7 +1495,8 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 								   attribute->get_type(attribute));
+ 				if (written >= len || written < 0)
+ 				{
+-					return buf;
++					attributes->destroy(attributes);
++					goto err;
+ 				}
+ 				pos += written;
+ 				len -= written;
+@@ -1507,7 +1508,7 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 				written = snprintf(pos, len, ")");
+ 				if (written >= len || written < 0)
+ 				{
+-					return buf;
++					goto err;
+ 				}
+ 				pos += written;
+ 				len -= written;
+@@ -1529,7 +1530,7 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 			}
+ 			if (written >= len || written < 0)
+ 			{
+-				return buf;
++				goto err;
+ 			}
+ 			pos += written;
+ 			len -= written;
+@@ -1544,7 +1545,7 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 							   frag->get_total_fragments(frag));
+ 			if (written >= len || written < 0)
+ 			{
+-				return buf;
++				goto err;
+ 			}
+ 			pos += written;
+ 			len -= written;
+@@ -1557,16 +1558,16 @@ static char* get_string(private_message_t *this, char *buf, int len)
+ 			written = snprintf(pos, len, "(%d)", unknown->get_type(unknown));
+ 			if (written >= len || written < 0)
+ 			{
+-				return buf;
++				goto err;
+ 			}
+ 			pos += written;
+ 			len -= written;
+ 		}
+ 	}
+-	enumerator->destroy(enumerator);
+-
+-	/* remove last space */
+ 	snprintf(pos, len, " ]");
++
++err:
++	enumerator->destroy(enumerator);
+ 	return buf;
+ }
+ #endif

meta-networking/recipes-support/strongswan/strongswan_6.0.7.bb

@@ -12,6 +12,7 @@ SRC_URI = "https://download.strongswan.org/strongswan-${PV}.tar.bz2 \
            file://CVE-2026-78123.patch \
            file://CVE-2026-78124.patch \
            file://CVE-2026-78126.patch \
+           file://CVE-2026-78127.patch \
 "
 
 SRC_URI[sha256sum] = "e518e34e159514f4c6ba80d1f926cb151e0dd4e3a1d94213171234b8b9ae6f55"