nghttp2: Fix CVE-2026-27135

Pick patch from [1] also mentioned in [2]
[1] https://github.com/nghttp2/nghttp2/commit/5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1
[2] https://nvd.nist.gov/vuln/detail/CVE-2026-27135

(From OE-Core rev: 892fdc819660ab67d9930e0ccb71e4138fcf1750)

Signed-off-by: Anil Dongare <adongare@cisco.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

2 files changed, 113 insertions, 1 deletions

diff --git a/meta/recipes-support/nghttp2/nghttp2/CVE-2026-27135.patch b/meta/recipes-support/nghttp2/nghttp2/CVE-2026-27135.patch
new file mode 100644
index 0000000000..c4977cded0
--- /dev/null
+++ b/meta/recipes-support/nghttp2/nghttp2/CVE-2026-27135.patch
@@ -0,0 +1,110 @@
+From f9812d447b14435de77751077ef48214ebf252ec Mon Sep 17 00:00:00 2001
+From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
+Date: Wed, 18 Feb 2026 18:04:30 +0900
+Subject: [PATCH] Fix missing iframe->state validations to avoid assertion
+ failure
+
+CVE: CVE-2026-27135
+Upstream-Status: Backport [https://github.com/nghttp2/nghttp2/commit/5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1]
+
+(cherry picked from commit 5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1)
+Signed-off-by: Anil Dongare <adongare@cisco.com>
+---
+ lib/nghttp2_session.c | 32 ++++++++++++++++++++++++++++++++
+ 1 file changed, 32 insertions(+)
+
+diff --git a/lib/nghttp2_session.c b/lib/nghttp2_session.c
+index 004a4dff..54312588 100644
+--- a/lib/nghttp2_session.c
++++ b/lib/nghttp2_session.c
+@@ -6079,6 +6079,10 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+           return rv;
+         }
+ 
++        if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++          return (nghttp2_ssize)inlen;
++        }
++
+         on_begin_frame_called = 1;
+ 
+         rv = session_process_headers_frame(session);
+@@ -6445,6 +6449,9 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+           if (nghttp2_is_fatal(rv)) {
+             return rv;
+           }
++          if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++            return (nghttp2_ssize)inlen;
++          }
+         }
+       }
+ 
+@@ -6701,6 +6708,10 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+           return rv;
+         }
+ 
++        if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++          return (nghttp2_ssize)inlen;
++        }
++
+         session_inbound_frame_reset(session);
+ 
+         break;
+@@ -7004,6 +7015,10 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+         if (nghttp2_is_fatal(rv)) {
+           return rv;
+         }
++
++        if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++          return (nghttp2_ssize)inlen;
++        }
+       } else {
+         iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
+       }
+@@ -7169,6 +7184,11 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+             rv = session->callbacks.on_data_chunk_recv_callback(
+                 session, iframe->frame.hd.flags, iframe->frame.hd.stream_id,
+                 in - readlen, (size_t)data_readlen, session->user_data);
++
++            if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++              return (nghttp2_ssize)inlen;
++            }
++
+             if (rv == NGHTTP2_ERR_PAUSE) {
+               return (nghttp2_ssize)(in - first);
+             }
+@@ -7256,6 +7276,10 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+           return rv;
+         }
+ 
++        if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++          return (nghttp2_ssize)inlen;
++        }
++
+         if (rv != 0) {
+           busy = 1;
+ 
+@@ -7274,6 +7298,10 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+         return rv;
+       }
+ 
++      if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++        return (nghttp2_ssize)inlen;
++      }
++
+       session_inbound_frame_reset(session);
+ 
+       break;
+@@ -7302,6 +7330,10 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+         return rv;
+       }
+ 
++      if (iframe->state == NGHTTP2_IB_IGN_ALL) {
++        return (nghttp2_ssize)inlen;
++      }
++
+       session_inbound_frame_reset(session);
+ 
+       break;
+-- 
+2.43.7
+
diff --git a/meta/recipes-support/nghttp2/nghttp2_1.61.0.bb b/meta/recipes-support/nghttp2/nghttp2_1.61.0.bb
index ad85576dcb..ebba15db28 100644
--- a/meta/recipes-support/nghttp2/nghttp2_1.61.0.bb
+++ b/meta/recipes-support/nghttp2/nghttp2_1.61.0.bb
@@ -4,7 +4,9 @@ SECTION = "libs"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://COPYING;md5=764abdf30b2eadd37ce47dcbce0ea1ec"
 
-SRC_URI = "${GITHUB_BASE_URI}/download/v${PV}/nghttp2-${PV}.tar.xz"
+SRC_URI = "${GITHUB_BASE_URI}/download/v${PV}/nghttp2-${PV}.tar.xz \
+           file://CVE-2026-27135.patch \
+           "
 SRC_URI[sha256sum] = "c0e660175b9dc429f11d25b9507a834fb752eea9135ab420bb7cb7e9dbcc9654"
 
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