diff --git a/src/corelib/.prev_configure.cmake b/src/corelib/.prev_configure.cmake
index 6619762a29..b410879c45 100644
--- a/src/corelib/.prev_configure.cmake
+++ b/src/corelib/.prev_configure.cmake
@@ -929,6 +929,10 @@ qt_feature("etw" PRIVATE
     ENABLE INPUT_trace STREQUAL 'etw' OR ( INPUT_trace STREQUAL 'yes' AND WIN32 )
     DISABLE INPUT_trace STREQUAL 'lttng' OR INPUT_trace STREQUAL 'no'
 )
+qt_feature("forkfd_pidfd" PRIVATE
+    LABEL "pidfd support in forkfd"
+    CONDITION LINUX
+)
 qt_feature("win32_system_libs"
     LABEL "Windows System Libraries"
     CONDITION WIN32 AND libs.advapi32 AND libs.gdi32 AND libs.kernel32 AND libs.netapi32 AND libs.ole32 AND libs.shell32 AND libs.uuid AND libs.user32 AND libs.winmm AND libs.ws2_32 OR FIXME
@@ -966,6 +970,10 @@ qt_configure_add_summary_entry(
 )
 qt_configure_add_summary_entry(ARGS "pcre2")
 qt_configure_add_summary_entry(ARGS "system-pcre2")
+qt_configure_add_summary_entry(
+    ARGS "forkfd_pidfd"
+    CONDITION LINUX
+)
 qt_configure_end_summary_section() # end of "Qt Core" section
 qt_configure_add_report_entry(
     TYPE NOTE
diff --git a/src/corelib/configure.cmake b/src/corelib/configure.cmake
index a6aecd2ae1..1288666a3d 100644
--- a/src/corelib/configure.cmake
+++ b/src/corelib/configure.cmake
@@ -935,6 +935,10 @@ qt_feature("etw" PRIVATE
     ENABLE INPUT_trace STREQUAL 'etw' OR ( INPUT_trace STREQUAL 'yes' AND WIN32 )
     DISABLE INPUT_trace STREQUAL 'lttng' OR INPUT_trace STREQUAL 'no'
 )
+qt_feature("forkfd_pidfd" PRIVATE
+    LABEL "CLONE_PIDFD support in forkfd"
+    CONDITION LINUX
+)
 qt_feature("win32_system_libs"
     LABEL "Windows System Libraries"
     CONDITION WIN32 AND libs.advapi32 AND libs.gdi32 AND libs.kernel32 AND libs.netapi32 AND libs.ole32 AND libs.shell32 AND libs.uuid AND libs.user32 AND libs.winmm AND libs.ws2_32 OR FIXME
@@ -972,6 +976,10 @@ qt_configure_add_summary_entry(
 )
 qt_configure_add_summary_entry(ARGS "pcre2")
 qt_configure_add_summary_entry(ARGS "system-pcre2")
+qt_configure_add_summary_entry(
+    ARGS "forkfd_pidfd"
+    CONDITION LINUX
+)
 qt_configure_end_summary_section() # end of "Qt Core" section
 qt_configure_add_report_entry(
     TYPE NOTE
diff --git a/src/corelib/configure.json b/src/corelib/configure.json
index 8e2d4e859d..27fff51a0f 100644
--- a/src/corelib/configure.json
+++ b/src/corelib/configure.json
@@ -1013,6 +1013,11 @@
             "condition": "config.win32",
             "output": [ "privateFeature" ]
         },
+        "forkfd_pidfd": {
+            "label": "CLONE_PIDFD support in forkfd",
+            "condition": "config.linux",
+            "output": [ "privateFeature" ]
+        },
         "win32_system_libs": {
             "label": "Windows System Libraries",
             "condition": "config.win32 && libs.advapi32 && libs.gdi32 && libs.kernel32 && libs.netapi32 && libs.ole32 && libs.shell32 && libs.uuid && libs.user32 && libs.winmm && libs.ws2_32"
@@ -1094,7 +1099,12 @@ Note that this is required for plugin loading. Qt GUI needs QPA plugins for basi
                     "condition": "config.qnx"
                 },
                 "pcre2",
-                "system-pcre2"
+                "system-pcre2",
+                {
+                    "type": "feature",
+                    "args": "forkfd_pidfd",
+                    "condition": "config.linux"
+                }
             ]
         }
     ]
diff --git a/src/corelib/io/qprocess_unix.cpp b/src/corelib/io/qprocess_unix.cpp
index f14e78f94e..5fce848c2c 100644
--- a/src/corelib/io/qprocess_unix.cpp
+++ b/src/corelib/io/qprocess_unix.cpp
@@ -461,6 +461,12 @@ void QProcessPrivate::startProcess()
     int ffdflags = FFD_CLOEXEC;
     if (childProcessModifier)
         ffdflags |= FFD_USE_FORK;
+
+    // QTBUG-86285
+#if !QT_CONFIG(forkfd_pidfd)
+    ffdflags |= FFD_USE_FORK;
+#endif
+
     pid_t childPid;
     forkfd = ::forkfd(ffdflags , &childPid);
     int lastForkErrno = errno;