diff --git a/pkgs/development/libraries/libtasn1/default.nix b/pkgs/development/libraries/libtasn1/default.nix
index dbd203b97cf..516005b874f 100644
--- a/pkgs/development/libraries/libtasn1/default.nix
+++ b/pkgs/development/libraries/libtasn1/default.nix
@@ -1,18 +1,18 @@
 { stdenv, fetchurl, perl, texinfo }:
 
 stdenv.mkDerivation rec {
-  name = "libtasn1-4.10";
+  name = "libtasn1-4.12";
 
   src = fetchurl {
     url = "mirror://gnu/libtasn1/${name}.tar.gz";
-    sha256 = "00jsix5hny0g768zv4hk78dib7w0qmk5fbizf4jj37r51nd4s6k8";
+    sha256 = "0ls7jdq3y5fnrwg0pzhq11m21r8pshac2705bczz6mqjc8pdllv7";
   };
 
   patches = [
     (fetchurl {
-      name = "CVE-2017-6891.patch";
-      url = "https://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=patch;h=5520704d075802df25ce4ffccc010ba1641bd484";
-      sha256 = "000r6wb87zkx8yhzkf1c3h7p5akwhjw51cv8f1yjnplrqqrr7h2k";
+      name = "CVE-2017-9310.patch";
+      url = "https://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=patch;h=d8d805e1f2e6799bb2dff4871a8598dc83088a39";
+      sha256 = "1v5w0dazp9qc2v7pc8b6g7s4dz5ak10hzrn35hx66q76yzrrzp7i";
     })
   ];