diff --git a/config.guess b/config.guess
index 354a8cc..5c545d7 100755
--- a/config.guess
+++ b/config.guess
@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2023-06-23'
+timestamp='2023-07-19'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -1042,6 +1042,15 @@ EOF
     k1om:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;
+    kvx:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    kvx:cos:*:*)
+	GUESS=$UNAME_MACHINE-unknown-cos
+	;;
+    kvx:mbr:*:*)
+	GUESS=$UNAME_MACHINE-unknown-mbr
+	;;
     loongarch32:Linux:*:* | loongarch64:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;
diff --git a/config.sub b/config.sub
index 6323fdb..db6abe9 100755
--- a/config.sub
+++ b/config.sub
@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2023-07-13'
+timestamp='2023-07-19'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -1206,6 +1206,7 @@ case $cpu-$vendor in
 			| i370 | i*86 | i860 | i960 | ia16 | ia64 \
 			| ip2k | iq2000 \
 			| k1om \
+			| kvx \
 			| le32 | le64 \
 			| lm32 \
 			| loongarch32 | loongarch64 \
@@ -1759,7 +1760,7 @@ case $os in
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
-	     | fiwix* | mlibc* )
+	     | fiwix* | mlibc* | cos* | mbr* )
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
diff --git a/doc/config.guess.1 b/doc/config.guess.1
index 3667ce9..ccc6dfa 100644
--- a/doc/config.guess.1
+++ b/doc/config.guess.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.48.5.
-.TH CONFIG.GUESS "1" "June 2023" "GNU config.guess (2023-06-23)" "User Commands"
+.TH CONFIG.GUESS "1" "July 2023" "GNU config.guess (2023-07-19)" "User Commands"
 .SH NAME
 config.guess \- guess the build system triplet
 .SH SYNOPSIS
diff --git a/doc/config.sub.1 b/doc/config.sub.1
index bacca25..fe94bc9 100644
--- a/doc/config.sub.1
+++ b/doc/config.sub.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.48.5.
-.TH CONFIG.SUB "1" "July 2023" "GNU config.sub (2023-07-13)" "User Commands"
+.TH CONFIG.SUB "1" "July 2023" "GNU config.sub (2023-07-19)" "User Commands"
 .SH NAME
 config.sub \- validate and canonicalize a configuration triplet
 .SH SYNOPSIS
diff --git a/testsuite/config-guess.data b/testsuite/config-guess.data
index f02cde4..424bea1 100644
--- a/testsuite/config-guess.data
+++ b/testsuite/config-guess.data
@@ -92,6 +92,9 @@ i86pc | 5.6 | SunOS | ignored | ignored | i386-pc-solaris2.6
 i86xen | 5.0 | AuroraUX | ignored | ignored | i386-pc-auroraux5.0
 i86xen | 5.6 | SunOS | ignored | ignored | i386-pc-solaris2.6
 k1om | 2.6.38 | Linux | ignored | ignored | k1om-unknown-linux-gnu
+kvx | ignored | Linux | ignored | ignored | kvx-unknown-linux-gnu
+kvx | ignored | cos | ignored | ignored | kvx-unknown-cos
+kvx | ignored | mbr | ignored | ignored | kvx-unknown-mbr
 loongarch32 | ignored | Linux | ignored | ignored | loongarch32-unknown-linux-gnu
 loongarch64 | ignored | Linux | ignored | ignored | loongarch64-unknown-linux-gnu
 m68k | 12.1 | AROS | ignored | ignored | m68k-unknown-aros
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index 3c39d6c..f83a9bf 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -343,6 +343,14 @@ j90-cray					j90-cray-unicos
 j90-unicos					j90-cray-unicos
 k1om						k1om-unknown-none
 k1om-linux					k1om-unknown-linux-gnu
+kvx-cos						kvx-unknown-cos
+kvx-elf						kvx-unknown-elf
+kvx-linux					kvx-unknown-linux-gnu
+kvx-linux-gnu					kvx-unknown-linux-gnu
+kvx-linux-musl					kvx-unknown-linux-musl
+kvx-linux-newlib				kvx-unknown-linux-newlib
+kvx-linux-uclibc				kvx-unknown-linux-uclibc
+kvx-mbr						kvx-unknown-mbr
 le32						le32-unknown-none
 le32-nacl					le32-unknown-nacl
 le64						le64-unknown-none