diff --git a/.checkpackageignore b/.checkpackageignore
index 426d112c14..23b7e734d9 100644
--- a/.checkpackageignore
+++ b/.checkpackageignore
@@ -234,9 +234,6 @@ package/asterisk/0004-install-samples-need-the-data-files.patch lib_patch.Upstre
 package/at/0001-Makefile.in-fix-make-install-for-non-root-don-t-stri.patch lib_patch.Upstream
 package/at/S99at lib_sysv.Indent lib_sysv.Variables
 package/attr/0001-build-with-older-GCCs.patch lib_patch.Upstream
-package/aufs-util/0001-remove-user-settings.patch lib_patch.Upstream
-package/aufs-util/0002-no-check-ver.patch lib_patch.Upstream
-package/aufs-util/0003-no-strip-lib.patch lib_patch.Upstream
 package/aumix/0001-fix-incorrect-makefile-am.patch lib_patch.Upstream
 package/autoconf/0001-dont-add-dirty-to-version.patch lib_patch.Upstream
 package/automake/0001-noman.patch lib_patch.Upstream
diff --git a/Config.in.legacy b/Config.in.legacy
index 181ec4b3b1..895e42fc30 100644
--- a/Config.in.legacy
+++ b/Config.in.legacy
@@ -146,6 +146,19 @@ endif
 
 comment "Legacy options removed in 2025.11"
 
+config BR2_LINUX_KERNEL_EXT_AUFS
+	bool "Aufs Filesystem Module patch has been removed"
+	select BR2_LEGACY
+	help
+	  aufs kernel module patch is unmaintained and has been
+	  removed.
+
+config BR2_PACKAGE_AUFS_UTIL
+	bool "aufs-util has been removed"
+	select BR2_LEGACY
+	help
+	  aufs-util package is unmaintained and has been removed.
+
 config BR2_TOOLCHAIN_EXTERNAL_LINARO_ARMEB
 	bool "Linaro armeb 2018.05 external toolchain is deprecated"
 	select BR2_LEGACY
diff --git a/linux/Config.ext.in b/linux/Config.ext.in
index 229d6b8c76..e1d99426ff 100644
--- a/linux/Config.ext.in
+++ b/linux/Config.ext.in
@@ -76,68 +76,6 @@ config BR2_LINUX_KERNEL_EXT_FBTFT
 
 	  https://github.com/notro/fbtft
 
-# aufs-standalone
-config BR2_LINUX_KERNEL_EXT_AUFS
-	bool "Aufs Filesystem Module patch"
-	select BR2_PACKAGE_AUFS
-	help
-	  Aufs is split in two parts: a kernel part and a userspace
-	  part. Enabling this option automatically selects the aufs
-	  standalone (module) package and patches the Linux kernel
-	  built by Buildroot with the aufs kernel part (ie fs/aufs).
-
-	  It is important to use the correct branch of aufs-standalone.
-
-if BR2_LINUX_KERNEL_EXT_AUFS
-
-choice
-	bool "aufs-standalone series"
-	help
-	  Select the major series of this version. This must match the
-	  major version of your kernel (e.g. for kernels 3.x, select
-	  aufs3.x; for kernels 4.x, select aufs4.x; for kernels 5.x,
-	  select aufs5.x ).
-
-	  Note: neither aufs1.x nor aufs2.x (both for kernels older than
-	  3.x) are supported.
-
-config BR2_LINUX_KERNEL_EXT_AUFS_SERIES_3
-	bool "aufs3.x"
-
-config BR2_LINUX_KERNEL_EXT_AUFS_SERIES_4
-	bool "aufs4.x"
-
-config BR2_LINUX_KERNEL_EXT_AUFS_SERIES_5
-	bool "aufs5.x"
-
-endchoice
-
-config BR2_LINUX_KERNEL_EXT_AUFS_SERIES
-	int
-	default 3 if BR2_LINUX_KERNEL_EXT_AUFS_SERIES_3
-	default 4 if BR2_LINUX_KERNEL_EXT_AUFS_SERIES_4
-	default 5 if BR2_LINUX_KERNEL_EXT_AUFS_SERIES_5
-
-config BR2_LINUX_KERNEL_EXT_AUFS_VERSION
-	string "aufs-standalone version"
-	default ""
-	help
-	  The version you choose must match that of your kernel.
-	  Usually, the sha1 of the cset you want to use; avoid using a
-	  branch name as this yields non-reproducible builds.
-
-	  See the following resources to see what versions are
-	  available:
-
-	  For aufs3.x:
-	  https://sourceforge.net/p/aufs/aufs3-standalone/ref/master/branches/
-	  For aufs4.x:
-	  https://github.com/sfjro/aufs4-standalone/branches/all
-	  For aufs5.x:
-	  https://github.com/sfjro/aufs5-standalone/branches/all
-
-endif # aufs
-
 # kernel extensions from br2-external trees, if any
 source "$BR2_BASE_DIR/.br2-external.in.linux"
 
diff --git a/linux/linux-ext-aufs.mk b/linux/linux-ext-aufs.mk
deleted file mode 100644
index d4bbb07196..0000000000
--- a/linux/linux-ext-aufs.mk
+++ /dev/null
@@ -1,21 +0,0 @@
-################################################################################
-#
-# Patch the linux kernel with aufs extension
-#
-################################################################################
-
-LINUX_EXTENSIONS += aufs
-
-define AUFS_PREPARE_KERNEL
-	if test -d $(@D)/fs/aufs/; then \
-		echo "Your kernel already supports AUFS."; \
-		exit 1; \
-	fi
-	$(APPLY_PATCHES) $(@D) $(AUFS_DIR) \
-		aufs$(BR2_PACKAGE_AUFS_SERIES)-kbuild.patch \
-		aufs$(BR2_PACKAGE_AUFS_SERIES)-base.patch \
-		aufs$(BR2_PACKAGE_AUFS_SERIES)-mmap.patch \
-		aufs$(BR2_PACKAGE_AUFS_SERIES)-standalone.patch
-	cp -r $(AUFS_DIR)/fs/aufs/ $(@D)/fs/
-	cp $(AUFS_DIR)/include/uapi/linux/aufs_type.h $(@D)/include/uapi/linux/
-endef
diff --git a/package/Config.in b/package/Config.in
index 5ac6dc6972..6b4eb7d15a 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -208,8 +208,6 @@ endmenu
 
 menu "Filesystem and flash utilities"
 	source "package/abootimg/Config.in"
-	source "package/aufs/Config.in"
-	source "package/aufs-util/Config.in"
 	source "package/autofs/Config.in"
 	source "package/bmap-tools/Config.in"
 	source "package/bmap-writer/Config.in"
diff --git a/package/aufs-util/0001-remove-user-settings.patch b/package/aufs-util/0001-remove-user-settings.patch
deleted file mode 100644
index 7eebc95dd4..0000000000
--- a/package/aufs-util/0001-remove-user-settings.patch
+++ /dev/null
@@ -1,16 +0,0 @@
-install: drop setting ownership
-
-Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
-
-diff --git a/Makefile b/Makefile
---- a/Makefile
-+++ b/Makefile
-@@ -21,7 +21,7 @@
- override CPPFLAGS += -DAUFHSM_CMD=\"/usr/bin/aufhsm\"
- override CFLAGS += -O -Wall
- INSTALL ?= install
--Install = ${INSTALL} -o root -g root -p
-+Install = ${INSTALL} -p
- ManDir = /usr/share/man
- 
- #
diff --git a/package/aufs-util/0002-no-check-ver.patch b/package/aufs-util/0002-no-check-ver.patch
deleted file mode 100644
index 5fe692072f..0000000000
--- a/package/aufs-util/0002-no-check-ver.patch
+++ /dev/null
@@ -1,24 +0,0 @@
-Makefile: do not check version
-
-The aufs-util package tries to ensure that its version is compatible
-with the one in the running kernel. However, this test is flawed: the
-version string in the aufs4x branch for aufs-util is aufs3.x, so it does
-not match the version in the kernel when it is aufs4.x.
-
-Disengage this check, ion the assumption the user knows what he is
-doing.
-
-Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
-
-diff --git a/Makefile b/Makefile
---- a/Makefile
-+++ b/Makefile
-@@ -62,7 +62,7 @@
- $(foreach v, CPPFLAGS CFLAGS INSTALL Install ManDir LibUtilHdr, \
- 	$(eval MAKE += ${v}="$${${v}}"))
- 
--all: ver_test ${Man} ${Bin} ${Etc}
-+all: ${Man} ${Bin} ${Etc}
- 	${MAKE} -C libau $@
- 	ln -sf ./libau/libau*.so .
- 	$(call MakeFHSM, $@)
diff --git a/package/aufs-util/0003-no-strip-lib.patch b/package/aufs-util/0003-no-strip-lib.patch
deleted file mode 100644
index 15830503b5..0000000000
--- a/package/aufs-util/0003-no-strip-lib.patch
+++ /dev/null
@@ -1,18 +0,0 @@
-install: do not strip libs when installing
-
-We want unstripped binaries in staging; stripping is done by Buildroot
-as a whole in target-finalize if needed, anyway.
-
-Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
-
-diff --git a/libau/Makefile b/libau/Makefile
---- a/libau/Makefile
-+++ b/libau/Makefile
-@@ -37,7 +37,6 @@
- 	ln -sf $< $@
- ${LibSo}.${LibSoMajor}: ${LibSo}.${LibSoMajor}.${LibSoMinor}
- 	ln -sf $< $@
--${LibSo}.${LibSoMajor}.${LibSoMinor}: override LDFLAGS += -s
- ${LibSo}.${LibSoMajor}.${LibSoMinor}: override LDLIBS += -ldl -lpthread
- ${LibSo}.${LibSoMajor}.${LibSoMinor}: ${LibSoObj}
- 	${CC} --shared -Wl,-soname,${LibSo}.${LibSoMajor} ${LDFLAGS} \
diff --git a/package/aufs-util/Config.in b/package/aufs-util/Config.in
deleted file mode 100644
index a426343fd3..0000000000
--- a/package/aufs-util/Config.in
+++ /dev/null
@@ -1,36 +0,0 @@
-comment "aufs-util needs a linux kernel and a toolchain w/ threads"
-	depends on BR2_USE_MMU
-	depends on !BR2_LINUX_KERNEL || !BR2_TOOLCHAIN_HAS_THREADS
-
-config BR2_PACKAGE_AUFS_UTIL
-	bool "aufs-util"
-	depends on BR2_USE_MMU
-	depends on BR2_LINUX_KERNEL
-	depends on BR2_TOOLCHAIN_HAS_THREADS
-	help
-	  Aufs command line utilities.
-
-	  Needs a kernel with aufs support. A kernel
-	  extension package is available.
-
-	  http://sourceforge.net/p/aufs/aufs-util/
-
-if BR2_PACKAGE_AUFS_UTIL
-
-config BR2_PACKAGE_AUFS_UTIL_VERSION
-	string "aufs-util version"
-	default ""
-	help
-	  The version you choose must match that of the aufs support
-	  in your kernel. Usually, this is aufs3.x for 3.x kernels and
-	  aufs4.x for 4.x kernels.
-
-	  Usually, the sha1 of the cset you want to use; avoid using a
-	  branch name as this yields non-reproducible builds.
-
-	  See the following resources to see what versions are
-	  available:
-
-	  https://sourceforge.net/p/aufs/aufs-util/ci/master/tree/
-
-endif
diff --git a/package/aufs-util/aufs-util.mk b/package/aufs-util/aufs-util.mk
deleted file mode 100644
index 32f3bca151..0000000000
--- a/package/aufs-util/aufs-util.mk
+++ /dev/null
@@ -1,59 +0,0 @@
-################################################################################
-#
-# aufs-util
-#
-################################################################################
-
-# linux-headers
-AUFS_UTIL_VERSION = $(call qstrip,$(BR2_PACKAGE_AUFS_UTIL_VERSION))
-AUFS_UTIL_SITE = https://git.code.sf.net/p/aufs/aufs-util
-AUFS_UTIL_SITE_METHOD = git
-AUFS_UTIL_LICENSE = GPL-2.0
-AUFS_UTIL_LICENSE_FILES = COPYING
-
-AUFS_UTIL_DEPENDENCIES = linux
-
-# Building aufs-util requires access to the kernel headers of aufs,
-# which are only available in the kernel build directory, which is why
-# we add -I$(LINUX_DIR)/include/uapi. These headers have not been
-# prepared for usage by userspace, so to workaround this we have to
-# defined the "__user" macro as empty.
-AUFS_UTIL_HOST_CPPFLAGS = \
-	$(HOST_CPPFLAGS) \
-	-I$(LINUX_DIR)/include/uapi \
-	-D__user=
-
-AUFS_UTIL_CPPFLAGS = \
-	$(TARGET_CPPFLAGS) \
-	-I$(LINUX_DIR)/include/uapi \
-	-D__user=
-
-# rdu64 is supposed to provide the LFS variant of readdir(),
-# readdir64(). However, because Buildroot is always LFS-enabled,
-# readdir() is always the LFS variant. Drop rdu64 from the build, as
-# it causes build failures due to multiple implementations of
-# readdir64().
-define AUFS_UTIL_REMOVE_RDU64
-	$(SED) 's% rdu64.o%%' $(@D)/libau/Makefile
-endef
-
-AUFS_UTIL_POST_PATCH_HOOKS += AUFS_UTIL_REMOVE_RDU64
-
-# First, we build the host tools, needed to build the target tools.
-define AUFS_UTIL_BUILD_CMDS
-	$(HOST_MAKE_ENV) $(MAKE) -C $(@D) \
-		$(HOST_CONFIGURE_OPTS) \
-		CPPFLAGS="$(AUFS_UTIL_HOST_CPPFLAGS)" \
-		HOSTCC="$(HOSTCC)" HOSTLD="$(HOSTLD)" \
-		INSTALL="$(INSTALL)" c2sh c2tmac
-	$(TARGET_MAKE_ENV) $(MAKE1) -C $(@D) \
-		$(TARGET_CONFIGURE_OPTS) \
-		CPPFLAGS="$(AUFS_UTIL_CPPFLAGS)" \
-		INSTALL="$(INSTALL)" all
-endef
-
-define AUFS_UTIL_INSTALL_TARGET_CMDS
-	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) INSTALL="$(INSTALL)" DESTDIR="$(TARGET_DIR)" install
-endef
-
-$(eval $(generic-package))
diff --git a/package/aufs/Config.in b/package/aufs/Config.in
deleted file mode 100644
index cc5ff365fe..0000000000
--- a/package/aufs/Config.in
+++ /dev/null
@@ -1,16 +0,0 @@
-# Automatically selected by the corresponding linux extension
-config BR2_PACKAGE_AUFS
-	bool
-
-if BR2_PACKAGE_AUFS
-
-# Both come from the selection of the linux extension.
-config BR2_PACKAGE_AUFS_SERIES
-	int
-	default BR2_LINUX_KERNEL_EXT_AUFS_SERIES
-
-config BR2_PACKAGE_AUFS_VERSION
-	string
-	default BR2_LINUX_KERNEL_EXT_AUFS_VERSION
-
-endif
diff --git a/package/aufs/aufs.mk b/package/aufs/aufs.mk
deleted file mode 100644
index d00e7a1a21..0000000000
--- a/package/aufs/aufs.mk
+++ /dev/null
@@ -1,24 +0,0 @@
-################################################################################
-#
-# aufs
-#
-################################################################################
-
-AUFS_VERSION = $(call qstrip,$(BR2_PACKAGE_AUFS_VERSION))
-AUFS_LICENSE = GPL-2.0
-AUFS_LICENSE_FILES = COPYING
-
-ifeq ($(BR2_PACKAGE_AUFS_SERIES),3)
-AUFS_SITE = https://git.code.sf.net/p/aufs/aufs3-standalone
-AUFS_SITE_METHOD = git
-else ifeq ($(BR2_PACKAGE_AUFS_SERIES),4)
-AUFS_SITE = $(call github,sfjro,aufs4-standalone,$(AUFS_VERSION))
-else ifeq ($(BR2_PACKAGE_AUFS_SERIES),5)
-AUFS_SITE = $(call github,sfjro,aufs5-standalone,$(AUFS_VERSION))
-endif
-
-ifeq ($(BR_BUILDING):$(BR2_PACKAGE_AUFS):$(AUFS_VERSION),y:y:)
-$(error No aufs version specified)
-endif
-
-$(eval $(generic-package))
diff --git a/utils/checkpackagelib/test_lib_mk.py b/utils/checkpackagelib/test_lib_mk.py
index c86c55b9cb..3f97c25b2d 100644
--- a/utils/checkpackagelib/test_lib_mk.py
+++ b/utils/checkpackagelib/test_lib_mk.py
@@ -75,9 +75,6 @@ def test_Ifdef(testname, filename, string, expected):
 
 
 get_package_prefix_from_filename = [
-    ('linux extension',
-     'linux/linux-ext-aufs.mk',
-     ['aufs', 'AUFS']),
     ('linux tool',
      'package/linux-tools/linux-tool-gpio.mk.in',
      ['gpio', 'GPIO']),
diff --git a/utils/genrandconfig b/utils/genrandconfig
index 0ec478e6ca..ac80982f63 100755
--- a/utils/genrandconfig
+++ b/utils/genrandconfig
@@ -149,9 +149,6 @@ async def fixup_config(sysinfo, configfile):
         configlines.remove('BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH=""\n')
         configlines.append('BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH="microblazeel-buildroot-elf"\n')
 
-    if 'BR2_PACKAGE_AUFS_UTIL=y\n' in configlines and \
-       'BR2_PACKAGE_AUFS_UTIL_VERSION=""\n' in configlines:
-        return False
     if 'BR2_PACKAGE_A10DISP=y\n' in configlines:
         return False
 
@@ -252,11 +249,6 @@ async def fixup_config(sysinfo, configfile):
        'BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM=y\n' in configlines:
         configlines.remove('BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM=y')
 
-    if 'BR2_LINUX_KERNEL_EXT_AUFS=y\n' in configlines and \
-       'BR2_LINUX_KERNEL_EXT_AUFS_VERSION=""\n' in configlines:
-        configlines.remove('BR2_LINUX_KERNEL_EXT_AUFS=y\n')
-        configlines.remove('BR2_LINUX_KERNEL_EXT_AUFS_VERSION=""\n')
-
     if 'BR2_PACKAGE_LINUX_BACKPORTS=y\n' in configlines and \
        'BR2_PACKAGE_LINUX_BACKPORTS_USE_CUSTOM_CONFIG=y\n' in configlines and \
        'BR2_PACKAGE_LINUX_BACKPORTS_CUSTOM_CONFIG_FILE=""\n' in configlines: