diff --git a/libksba-1.5.1-overflow.patch b/libksba-1.5.1-overflow.patch
index d4206de..c37f135 100644
--- a/libksba-1.5.1-overflow.patch
+++ b/libksba-1.5.1-overflow.patch
@@ -40,3 +40,65 @@ index 81c31ed..56efb6a 100644
 -- 
 2.37.3
 
+commit f61a5ea4e0f6a80fd4b28ef0174bee77793cf070
+Author: Werner Koch <wk@gnupg.org>
+Date:   Tue Nov 22 16:36:46 2022 +0100
+
+    Fix an integer overflow in the CRL signature parser.
+    
+    * src/crl.c (parse_signature): N+N2 now checked for overflow.
+    
+    * src/ocsp.c (parse_response_extensions): Do not accept too large
+    values.
+    (parse_single_extensions): Ditto.
+    --
+    
+    The second patch is an extra safegourd not related to the reported
+    bug.
+    
+    GnuPG-bug-id: 6284
+    Reported-by: Joseph Surin, elttam
+
+diff --git a/src/crl.c b/src/crl.c
+index 9f71c85..2e6ca29 100644
+--- a/src/crl.c
++++ b/src/crl.c
+@@ -1349,7 +1349,7 @@ parse_signature (ksba_crl_t crl)
+          && !ti.is_constructed) )
+     return gpg_error (GPG_ERR_INV_CRL_OBJ);
+   n2 = ti.nhdr + ti.length;
+-  if (n + n2 >= DIM(tmpbuf))
++  if (n + n2 >= DIM(tmpbuf) || (n + n2) < n)
+     return gpg_error (GPG_ERR_TOO_LARGE);
+   memcpy (tmpbuf+n, ti.buf, ti.nhdr);
+   err = read_buffer (crl->reader, tmpbuf+n+ti.nhdr, ti.length);
+diff --git a/src/ocsp.c b/src/ocsp.c
+index d4cba04..657d15f 100644
+--- a/src/ocsp.c
++++ b/src/ocsp.c
+@@ -721,6 +721,12 @@ parse_response_extensions (ksba_ocsp_t ocsp,
+           else
+             ocsp->good_nonce = 1;
+         }
++      if (ti.length > (1<<24))
++        {
++          /* Bail out on much too large objects.  */
++          err = gpg_error (GPG_ERR_BAD_BER);
++          goto leave;
++        }
+       ex = xtrymalloc (sizeof *ex + strlen (oid) + ti.length);
+       if (!ex)
+         {
+@@ -788,6 +794,12 @@ parse_single_extensions (struct ocsp_reqitem_s *ri,
+       err = parse_octet_string (&data, &datalen, &ti);
+       if (err)
+         goto leave;
++      if (ti.length > (1<<24))
++        {
++          /* Bail out on much too large objects.  */
++          err = gpg_error (GPG_ERR_BAD_BER);
++          goto leave;
++        }
+       ex = xtrymalloc (sizeof *ex + strlen (oid) + ti.length);
+       if (!ex)
+         {