diff --git a/SOURCES/zlib-1.2.11-IBM-Z-hw-accelrated-deflate-strm-adler-fix.patch b/SOURCES/zlib-1.2.11-IBM-Z-hw-accelrated-deflate-strm-adler-fix.patch
new file mode 100644
index 0000000..8f70f9b
--- /dev/null
+++ b/SOURCES/zlib-1.2.11-IBM-Z-hw-accelrated-deflate-strm-adler-fix.patch
@@ -0,0 +1,11 @@
+--- a/contrib/s390/dfltcc.c
++++ b/contrib/s390/dfltcc.c
+@@ -623,7 +623,7 @@
+     state->bits = param->sbb;
+     state->whave = param->hl;
+     state->wnext = (param->ho + param->hl) & ((1 << HB_BITS) - 1);
+-    state->check = state->flags ? ZSWAP32(param->cv) : param->cv;
++    strm->adler = state->check = state->flags ? ZSWAP32(param->cv) : param->cv;
+     if (cc == DFLTCC_CC_OP2_CORRUPT && param->oesc != 0) {
+         /* Report an error if stream is corrupted */
+         state->mode = BAD;
diff --git a/SOURCES/zlib-1.2.11-cve-2022-37434.patch b/SOURCES/zlib-1.2.11-cve-2022-37434.patch
new file mode 100644
index 0000000..1f3aa8d
--- /dev/null
+++ b/SOURCES/zlib-1.2.11-cve-2022-37434.patch
@@ -0,0 +1,35 @@
+From eff308af425b67093bab25f80f1ae950166bece1 Mon Sep 17 00:00:00 2001
+From: Mark Adler <fork@madler.net>
+Date: Sat, 30 Jul 2022 15:51:11 -0700
+Subject: [PATCH] Fix a bug when getting a gzip header extra field with
+ inflate().
+
+If the extra field was larger than the space the user provided with
+inflateGetHeader(), and if multiple calls of inflate() delivered
+the extra header data, then there could be a buffer overflow of the
+provided space. This commit assures that provided space is not
+exceeded.
+---
+ inflate.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/inflate.c b/inflate.c
+index 7be8c63..7a72897 100644
+--- a/inflate.c
++++ b/inflate.c
+@@ -763,9 +763,10 @@ int flush;
+                 copy = state->length;
+                 if (copy > have) copy = have;
+                 if (copy) {
++                    len = state->head->extra_len - state->length;
+                     if (state->head != Z_NULL &&
+-                        state->head->extra != Z_NULL) {
+-                        len = state->head->extra_len - state->length;
++                        state->head->extra != Z_NULL &&
++                        len < state->head->extra_max) {
+                         zmemcpy(state->head->extra + len, next,
+                                 len + copy > state->head->extra_max ?
+                                 state->head->extra_max - len : copy);
+-- 
+2.35.3
+
diff --git a/SOURCES/zlib-1.2.11-cve-2022-37434_2.patch b/SOURCES/zlib-1.2.11-cve-2022-37434_2.patch
new file mode 100644
index 0000000..d0e9d1b
--- /dev/null
+++ b/SOURCES/zlib-1.2.11-cve-2022-37434_2.patch
@@ -0,0 +1,32 @@
+From 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d Mon Sep 17 00:00:00 2001
+From: Mark Adler <fork@madler.net>
+Date: Mon, 8 Aug 2022 10:50:09 -0700
+Subject: [PATCH] Fix extra field processing bug that dereferences NULL
+ state->head.
+
+The recent commit to fix a gzip header extra field processing bug
+introduced the new bug fixed here.
+---
+ inflate.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/inflate.c b/inflate.c
+index 7a72897..2a3c4fe 100644
+--- a/inflate.c
++++ b/inflate.c
+@@ -763,10 +763,10 @@ int flush;
+                 copy = state->length;
+                 if (copy > have) copy = have;
+                 if (copy) {
+-                    len = state->head->extra_len - state->length;
+                     if (state->head != Z_NULL &&
+                         state->head->extra != Z_NULL &&
+-                        len < state->head->extra_max) {
++                        (len = state->head->extra_len - state->length) <
++                            state->head->extra_max) {
+                         zmemcpy(state->head->extra + len, next,
+                                 len + copy > state->head->extra_max ?
+                                 state->head->extra_max - len : copy);
+-- 
+2.35.3
+
diff --git a/SPECS/zlib.spec b/SPECS/zlib.spec
index 97ad27d..acf66c0 100644
--- a/SPECS/zlib.spec
+++ b/SPECS/zlib.spec
@@ -3,7 +3,7 @@
 
 Name:    zlib
 Version: 1.2.11
-Release: 19%{?dist}
+Release: 21%{?dist}
 Summary: The compression and decompression library
 # /contrib/dotzlib/ have Boost license
 License: zlib and Boost
@@ -35,6 +35,13 @@ Patch10: zlib-1.2.11-CVE-2018-25032.patch
 # Fix the compressBound() on z15
 Patch11: zlib-1.2.11-IBM-Z-hw-accelrated-deflate-compressBound-fix.patch
 
+# Fix CVE-2022-37434
+Patch12: zlib-1.2.11-cve-2022-37434.patch
+Patch13: zlib-1.2.11-cve-2022-37434_2.patch
+
+# Fix setting strm.adler on z15
+Patch14: zlib-1.2.11-IBM-Z-hw-accelrated-deflate-strm-adler-fix.patch
+
 BuildRequires: automake, autoconf, libtool
 
 %description
@@ -98,6 +105,10 @@ developing applications which use minizip.
 %patch9 -p1
 %patch10 -p1
 %patch11 -p1
+%patch12 -p1
+%patch13 -p1
+%patch14 -p1
+
 
 iconv -f iso-8859-2 -t utf-8 < ChangeLog > ChangeLog.tmp
 mv ChangeLog.tmp ChangeLog
@@ -177,6 +188,13 @@ find $RPM_BUILD_ROOT -name '*.la' -delete
 
 
 %changelog
+* Wed Oct 12 2022 Ilya Leoshkevich <iii@linux.ibm.com> - 1.2.11-21
+- Fix for IBM strm.adler rhbz#2134074
+
+* Tue Aug 09 2022 Matej Mužila <mmuzila@redhat.com> - 1.2.11-20
+- Fix heap-based buffer over-read or buffer overflow in inflate in inflate.c
+- Resolves: CVE-2022-37434
+
 * Mon May 16 2022 Lukas Javorsky <ljavorsk@redhat.com> - 1.2.11-19
 - Apply IBM patch for compressBound() function
 - Source from https://github.com/madler/zlib/issues/410#issuecomment-947212824