diff --git a/002-corosync.patch b/002-corosync.patch
new file mode 100644
index 0000000..3f048ce
--- /dev/null
+++ b/002-corosync.patch
@@ -0,0 +1,75 @@
+From b1fd6ccea9083826c1c2fb40418651704989a904 Mon Sep 17 00:00:00 2001
+From: Reid Wahl <nrwahl@protonmail.com>
+Date: Wed, 13 Aug 2025 17:33:16 -0700
+Subject: [PATCH] Fix: cts: Start corosync using systemd if available
+
+As of corosync upstream commit ae859515, in systemd builds,
+StateDirectory is set in the systemd corosync.service file. The corosync
+state directory defaults to this value if not set in the corosync config
+file. Corosync falls back to using /var/lib/corosync only if the systemd
+StateDirectory is not set.
+
+The same commit removes /var/lib/corosync from RPM builds with systemd.
+
+As a result, if corosync was built with systemd, then starting corosync
+outside of systemd fails unless /var/lib/corosync has been created
+manually or through some other means. Starting corosync directly from
+the command line fails with the following error, because the
+STATE_DIRECTORY environment variable was not set by systemd:
+
+Cannot chdir to state directory /var/lib/corosync. No such file or
+directory
+
+This causes Pacemaker's cts-fencing script to fail.
+
+This seems like a bug in corosync, as it now assumes that corosync will
+always be started by systemd if available. Here, we work around it in
+cts by doing exactly that.
+
+Signed-off-by: Reid Wahl <nrwahl@protonmail.com>
+---
+ python/pacemaker/_cts/corosync.py | 11 ++++++++++-
+ 1 file changed, 10 insertions(+), 1 deletion(-)
+
+diff --git a/python/pacemaker/_cts/corosync.py b/python/pacemaker/_cts/corosync.py
+index 0a55dd7c96..beb574d2b8 100644
+--- a/python/pacemaker/_cts/corosync.py
++++ b/python/pacemaker/_cts/corosync.py
+@@ -11,6 +11,7 @@ import tempfile
+ import time
+ 
+ from pacemaker.buildoptions import BuildOptions
++from pacemaker._cts.environment import EnvFactory
+ from pacemaker._cts.process import killall, stdout_from_command
+ 
+ 
+@@ -112,6 +113,9 @@ class Corosync:
+         self.logdir = logdir
+         self.cluster_name = cluster_name
+ 
++        # The Corosync class doesn't use self._env._nodes, but the
++        # "--nodes" argument is required to be present and nonempty
++        self._env = EnvFactory().getInstance(args=["--nodes", "localhost"])
+         self._existing_cfg_file = None
+ 
+     def _ready(self, logfile, timeout=10):
+@@ -149,10 +153,15 @@ class Corosync:
+                                                         self.cluster_name, localname())
+         logfile = corosync_log_file(BuildOptions.COROSYNC_CONFIG_FILE)
+ 
++        if self._env["have_systemd"]:
++            cmd = ["systemctl", "start", "corosync.service"]
++        else:
++            cmd = ["corosync"]
++
+         if self.verbose:
+             print("Starting corosync")
+ 
+-        with subprocess.Popen("corosync", stdout=subprocess.PIPE, stderr=subprocess.PIPE) as test:
++        with subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) as test:
+             test.wait()
+ 
+         # Wait for corosync to be ready before returning
+-- 
+2.50.1
+
diff --git a/pacemaker.spec b/pacemaker.spec
index ef4d2c8..efa30bc 100644
--- a/pacemaker.spec
+++ b/pacemaker.spec
@@ -1,5 +1,5 @@
 #
-# Copyright 2008-2024 the Pacemaker project contributors
+# Copyright 2008-2025 the Pacemaker project contributors
 #
 # The version control history for this file may have further details.
 #
@@ -41,7 +41,7 @@
 ## can be incremented to build packages reliably considered "newer"
 ## than previously built packages with the same pcmkversion)
 %global pcmkversion 3.0.1
-%global specversion 2
+%global specversion 3
 
 ## Upstream commit (full commit ID, abbreviated commit ID, or tag) to build
 %global commit 9a5e54bae85847c4bb6ed7c7fb06103ebebbc64a
@@ -200,6 +200,7 @@ Source0:       https://codeload.github.com/%{github_owner}/%{name}/tar.gz/%{arch
 Source1:       pacemaker.sysusers
 # upstream commits
 Patch001:      001-econnrefused.patch
+Patch002:      002-corosync.patch
 
 Requires:      resource-agents
 Requires:      %{pkgname_pcmk_libs}%{?_isa} = %{version}-%{release}
@@ -791,6 +792,10 @@ exit 0
 %{_datadir}/pkgconfig/pacemaker-schemas.pc
 
 %changelog
+* Wed Aug 13 2025 Reid Wahl <nwahl@redhat.com> - 3.0.1-3
+- CTS launches Corosync using systemd if available.
+- Resolves: RHEL-110075
+
 * Mon Aug 11 2025 Chris Lumens <clumens@redhat.com> - 3.0.1-2
 - Do not retry on ECONNREFUSED in command line tools.
 - Resolves: RHEL-106594