Changelog entry for DRBG mutex usage fix
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/ChangeLog.d/drbg-mutex.txt b/ChangeLog.d/drbg-mutex.txt
new file mode 100644
index 0000000..3ac5abf
--- /dev/null
+++ b/ChangeLog.d/drbg-mutex.txt
@@ -0,0 +1,5 @@
+Bugfix
+ * Fix a resource leak in CTR_DRBG and HMAC_DRBG when MBEDTLS_THREADING_C
+ is enabled, on platforms where initializing a mutex allocates resources.
+ This was a regression introduced in the previous release. Reported in
+ #4017, #4045 and #4071.
