diff --git a/changelogs/fragments/random_mac-random-int-fix.yaml b/changelogs/fragments/random_mac-random-int-fix.yaml
new file mode 100644
index 0000000000..73ced9fa41
--- /dev/null
+++ b/changelogs/fragments/random_mac-random-int-fix.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - random_mac - generate a proper MAC address when the provided vendor prefix is two or four characters (https://github.com/ansible/ansible/issues/50838)
diff --git a/lib/ansible/plugins/filter/core.py b/lib/ansible/plugins/filter/core.py
index f9314accdb..919cbe0aa9 100644
--- a/lib/ansible/plugins/filter/core.py
+++ b/lib/ansible/plugins/filter/core.py
@@ -37,7 +37,7 @@ import yaml
 from collections import Mapping, MutableMapping
 import datetime
 from functools import partial
-from random import Random, SystemRandom, shuffle, random
+from random import Random, SystemRandom, shuffle, randint
 
 from jinja2.filters import environmentfilter, do_groupby as _do_groupby
 
@@ -543,8 +543,8 @@ def random_mac(value):
     if len(err):
         raise AnsibleFilterError('Invalid value (%s) for random_mac: %s' % (value, err))
 
-    # Generate random float and make it int
-    v = int(random() * 10.0**10)
+    # Generate random int between x1000000000 and xFFFFFFFFFF
+    v = randint(68719476736, 1099511627775)
     # Select first n chars to complement input prefix
     remain = 2 * (6 - len(mac_items))
     rnd = ('%x' % v)[:remain]
diff --git a/test/integration/targets/filters/tasks/main.yml b/test/integration/targets/filters/tasks/main.yml
index a80c6814aa..6d5352e9b2 100644
--- a/test/integration/targets/filters/tasks/main.yml
+++ b/test/integration/targets/filters/tasks/main.yml
@@ -235,7 +235,11 @@
 - name:  Verify random_mac filter
   assert:
     that:
+            - "'00' | random_mac is match('^00:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]$')"
+            - "'00:00' | random_mac is match('^00:00:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]$')"  
             - "'00:00:00' | random_mac is match('^00:00:00:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]$')"
+            - "'00:00:00:00' | random_mac is match('^00:00:00:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]$')"
+            - "'00:00:00:00:00' | random_mac is match('^00:00:00:00:00:[a-f0-9][a-f0-9]$')"  
             - "'00:00:00' | random_mac != '00:00:00' | random_mac"
 
 - name: Ensure dict2items works with hostvars