diff -Nru sysstat-12.2.0/debian/changelog sysstat-12.2.0/debian/changelog
--- sysstat-12.2.0/debian/changelog	2019-12-22 11:44:20.000000000 +0000
+++ sysstat-12.2.0/debian/changelog	2019-12-23 19:11:03.000000000 +0000
@@ -1,3 +1,10 @@
+sysstat (12.2.0-2) unstable; urgency=medium
+
+  * Add 11-Double-free-in-check_file_actlst.patch, taken from upstream,
+    to really fix CVE-2019-19725 (closes: #946657).
+
+ -- Robert Luberda <robert@debian.org>  Mon, 23 Dec 2019 20:11:03 +0100
+
 sysstat (12.2.0-1) unstable; urgency=medium
 
   * New upstream stable version:
diff -Nru sysstat-12.2.0/debian/patches/11-Double-free-in-check_file_actlst.patch sysstat-12.2.0/debian/patches/11-Double-free-in-check_file_actlst.patch
--- sysstat-12.2.0/debian/patches/11-Double-free-in-check_file_actlst.patch	1970-01-01 00:00:00.000000000 +0000
+++ sysstat-12.2.0/debian/patches/11-Double-free-in-check_file_actlst.patch	2019-12-23 19:11:03.000000000 +0000
@@ -0,0 +1,25 @@
+From: Sebastien GODARD <sysstat@users.noreply.github.com>
+Date: Mon, 9 Dec 2019 17:54:07 +0100
+Subject: Fix #242: Double free in check_file_actlst()
+
+Avoid freeing buffer() twice.
+
+Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>
+
+Bugs-Debian: https://bugs.debian.org/946657
+---
+ sa_common.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/sa_common.c b/sa_common.c
+index de9c28a..32d1ea6 100644
+--- a/sa_common.c
++++ b/sa_common.c
+@@ -2152,6 +2152,7 @@ void check_file_actlst(int *ifd, char *dfile, struct activity *act[], uint64_t f
+ 	}
+ 
+ 	free(buffer);
++	buffer = NULL;
+ 
+ 	/* Check that at least one activity selected by the user is available in file */
+ 	for (i = 0; i < NR_ACT; i++) {
diff -Nru sysstat-12.2.0/debian/patches/series sysstat-12.2.0/debian/patches/series
--- sysstat-12.2.0/debian/patches/series	2019-12-22 11:44:20.000000000 +0000
+++ sysstat-12.2.0/debian/patches/series	2019-12-23 19:11:03.000000000 +0000
@@ -7,3 +7,4 @@
 08-scripts.patch
 09-enable-colors.patch
 10-ignore-ut-failures.patch
+11-Double-free-in-check_file_actlst.patch