diff --git a/SOURCES/libksba-1.5.1-overflow.patch b/SOURCES/libksba-1.5.1-overflow.patch
new file mode 100644
index 0000000..d4206de
--- /dev/null
+++ b/SOURCES/libksba-1.5.1-overflow.patch
@@ -0,0 +1,42 @@
+From 4b7d9cd4a018898d7714ce06f3faf2626c14582b Mon Sep 17 00:00:00 2001
+From: Werner Koch <wk@gnupg.org>
+Date: Wed, 5 Oct 2022 14:19:06 +0200
+Subject: [PATCH] Detect a possible overflow directly in the TLV parser.
+
+* src/ber-help.c (_ksba_ber_read_tl): Check for overflow of a commonly
+used sum.
+--
+
+It is quite common to have checks like
+
+    if (ti.nhdr + ti.length >= DIM(tmpbuf))
+       return gpg_error (GPG_ERR_TOO_LARGE);
+
+This patch detects possible integer overflows immmediately when
+creating the TI object.
+
+Reported-by: ZDI-CAN-18927, ZDI-CAN-18928, ZDI-CAN-18929
+---
+ src/ber-help.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/src/ber-help.c b/src/ber-help.c
+index 81c31ed..56efb6a 100644
+--- a/src/ber-help.c
++++ b/src/ber-help.c
+@@ -182,6 +182,12 @@ _ksba_ber_read_tl (ksba_reader_t reader, struct tag_info *ti)
+       ti->length = len;
+     }
+ 
++  if (ti->length > ti->nhdr && (ti->nhdr + ti->length) < ti->length)
++    {
++      ti->err_string = "header+length would overflow";
++      return gpg_error (GPG_ERR_EOVERFLOW);
++    }
++
+   /* Without this kludge some example certs can't be parsed */
+   if (ti->class == CLASS_UNIVERSAL && !ti->tag)
+     ti->length = 0;
+-- 
+2.37.3
+
diff --git a/SPECS/libksba.spec b/SPECS/libksba.spec
index 6727e0f..6cd13cf 100644
--- a/SPECS/libksba.spec
+++ b/SPECS/libksba.spec
@@ -1,7 +1,7 @@
 Summary: CMS and X.509 library
 Name:    libksba
 Version: 1.3.0
-Release: 5%{?dist}
+Release: 6%{?dist}
 
 # The library is licensed under LGPLv3+ or GPLv2+,
 # the rest of the package under GPLv3+
@@ -13,6 +13,8 @@ Source1: ftp://ftp.gnupg.org/gcrypt/libksba/libksba-%{version}.tar.bz2.sig
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 Patch1: libksba-1.3.0-multilib.patch
+# Fix for CVE-2022-3515
+Patch2: libksba-1.5.1-overflow.patch
 
 BuildRequires: gawk
 BuildRequires: libgpg-error-devel >= 1.8
@@ -37,6 +39,7 @@ Requires(preun): /sbin/install-info
 %setup -q
 
 %patch1 -p1 -b .multilib
+%patch2 -p1 -b .overflow
 
 
 %build
@@ -92,6 +95,9 @@ fi
 
 
 %changelog
+* Wed Oct 19 2022 Jakub Jelen <jjelen@redhat.com> - 1.3.0-6
+- Fix for CVE-2022-3515 (#2135695)
+
 * Fri Jan 24 2014 Daniel Mach <dmach@redhat.com> - 1.3.0-5
 - Mass rebuild 2014-01-24