diff --git a/nixos/tests/networking/networkmanager.nix b/nixos/tests/networking/networkmanager.nix
index 9177b9691ac8..b6581f244841 100644
--- a/nixos/tests/networking/networkmanager.nix
+++ b/nixos/tests/networking/networkmanager.nix
@@ -401,17 +401,6 @@ let
               driver = "nl80211";
               pkcs11 = {
                 enable = true;
-                package = pkgs.libp11.overrideAttrs {
-                  # TODO: Remove this override once a libp11 release includes the fix for
-                  # https://github.com/OpenSC/libp11/issues/672
-                  version = "0.4.21-unstable-2026-08-19";
-                  src = pkgs.fetchFromGitHub {
-                    owner = "OpenSC";
-                    repo = "libp11";
-                    rev = "e72a2014eb078c7b784e2a9be3e7abd3dce8fd5a";
-                    hash = "sha256-V9ZRPUJp2FkK+Zb/qYC13SDE7+oyJ/hlnO/XEN2zDD8=";
-                  };
-                };
               };
             };
           };
diff --git a/pkgs/by-name/li/libp11/package.nix b/pkgs/by-name/li/libp11/package.nix
index 62d90524f21a..eaec2778f853 100644
--- a/pkgs/by-name/li/libp11/package.nix
+++ b/pkgs/by-name/li/libp11/package.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation rec {
   pname = "libp11";
-  version = "0.4.18";
+  version = "0.4.21";
 
   src = fetchFromGitHub {
     owner = "OpenSC";
     repo = "libp11";
     rev = "${pname}-${version}";
-    sha256 = "sha256-bvVUiv8y5c0P9fHAFs1JX3V7xsorbKUmm0qt3l2SoQQ=";
+    sha256 = "sha256-Tqc9PJsVBmq1Qy+YQVmSiD2Yb7ppif5pJ7uRHyTlqQ8=";
   };
 
   configureFlags = [