new file mode 100644
@@ -0,0 +1,117 @@
+From 1d758b2cd2f13af02319274c4e48cd7a2dc62e42 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://download.strongswan.org/security/CVE-2026-78127/]
+Signed-off-by: Abhishek Bachiphale <Abhishek.Bachiphale@windriver.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 8da9a1d71e47..a4bf9cb26b73 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
+--
+2.43.0
+
@@ -13,6 +13,7 @@ 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] = "07df7cedae56a7f3bb07e66d21a1f9f87e961db70e99184e11d3819413e4f87c"
strongSwan (since 4.1.2, through 6.0.7) allows a denial of service via memory exhaustion in libcharon related to the logging of IKE messages. Reference: [https://nvd.nist.gov/vuln/detail/cve-2026-78127] [https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78127).html] [https://security-tracker.debian.org/tracker/CVE-2026-78127] Upstream Patch: [https://download.strongswan.org/security/CVE-2026-78127/] Signed-off-by: Abhishek Bachiphale <Abhishek.Bachiphale@windriver.com> --- .../strongswan/CVE-2026-78127.patch | 117 ++++++++++++++++++ .../strongswan/strongswan_6.0.6.bb | 1 + 2 files changed, 118 insertions(+) create mode 100644 meta-networking/recipes-support/strongswan/strongswan/CVE-2026-78127.patch