diff --git a/util/kconfig/patches/0015-util-kconfig-chmod-w-before-savedefconfig.patch b/util/kconfig/patches/0015-util-kconfig-chmod-w-before-savedefconfig.patch
new file mode 100644
index 0000000..2b96723
--- /dev/null
+++ b/util/kconfig/patches/0015-util-kconfig-chmod-w-before-savedefconfig.patch
@@ -0,0 +1,30 @@
+From 48ad5c23680c81614663e09c6586ebeb26bf8c18 Mon Sep 17 00:00:00 2001
+From: Richard Marko <srk@48.io>
+Date: Mon, 16 Oct 2023 15:26:33 +0200
+Subject: [PATCH] util/kconfig: chmod +w before savedefconfig
+
+This prevents a headscratcher when .config in root doesn't have a write
+permission bit set which causes a build failure of savedefconfig
+not able to write to copied file, for example
+
+*** Error while saving defconfig to:
+  build/mainboard/emulation/qemu-i440fx/cbfs-file.eU5E0t.out.tmp2
+
+Change-Id: I2e7d35c9f6e8add3e7438d163850bc5fda5a99b2
+Signed-off-by: Richard Marko <srk@48.io>
+---
+ util/kconfig/Makefile.inc | 1 +
+ 1 file changed, 1 insertion(+)
+
+Index: kconfig/Makefile.inc
+===================================================================
+--- kconfig.orig/Makefile.inc
++++ kconfig/Makefile.inc
+@@ -34,6 +34,7 @@ oldconfig: KCONFIG_STRICT=
+ 
+ savedefconfig: $(objk)/conf
+ 	cp $(DOTCONFIG) $(DEFCONFIG)
++	chmod +w $(DEFCONFIG)
+ 	$< --savedefconfig=$(DEFCONFIG) $(KBUILD_KCONFIG)
+ 
+ FORCE:
diff --git a/util/kconfig/patches/series b/util/kconfig/patches/series
index 655c493..252eb64 100644
--- a/util/kconfig/patches/series
+++ b/util/kconfig/patches/series
@@ -10,3 +10,4 @@
 0010-reenable-source-in-choice.patch
 0013-util-kconfig-detect-ncurses-on-FreeBSD.patch
 0014-util-kconfig-Move-Kconfig-deps-back-into-build-confi.patch
+0015-util-kconfig-chmod-w-before-savedefconfig.patch