diff --git a/composer.json b/composer.json
index d72b78c0933e366c503d36d452cd4ec49c12a00f..10f06d21c1290ede54e8ff6976b79a1e23b409c3 100644
--- a/composer.json
+++ b/composer.json
@@ -112,7 +112,7 @@
 		"friendsofphp/php-cs-fixer": "^3.37.1",
 		"friendsoftypo3/phpstan-typo3": "^0.9.0",
 		"php-webdriver/webdriver": "^1.14.0",
-		"phpstan/phpstan": "^1.10.40",
+		"phpstan/phpstan": "^1.10.41",
 		"phpstan/phpstan-phpunit": "^1.3.14",
 		"phpunit/phpunit": "^10.4.0",
 		"sokil/php-isocodes-db-i18n": "^4.0.13",
diff --git a/composer.lock b/composer.lock
index 3f9dc7325f0fd446054a1015d0f18e41dfb035ab..3156d228efe67c53aa081a878e7fef4ce6252980 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "fe99fbd9333ad5d709392daeda21ac8a",
+    "content-hash": "84005f906821d20927dcfa1889c25adb",
     "packages": [
         {
             "name": "bacon/bacon-qr-code",
@@ -6688,16 +6688,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.10.40",
+            "version": "1.10.41",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "93c84b5bf7669920d823631e39904d69b9c7dc5d"
+                "reference": "c6174523c2a69231df55bdc65b61655e72876d76"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/93c84b5bf7669920d823631e39904d69b9c7dc5d",
-                "reference": "93c84b5bf7669920d823631e39904d69b9c7dc5d",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/c6174523c2a69231df55bdc65b61655e72876d76",
+                "reference": "c6174523c2a69231df55bdc65b61655e72876d76",
                 "shasum": ""
             },
             "require": {
@@ -6746,7 +6746,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-10-30T14:48:31+00:00"
+            "time": "2023-11-05T12:57:57+00:00"
         },
         {
             "name": "phpstan/phpstan-phpunit",
diff --git a/typo3/sysext/core/Classes/Session/Backend/RedisSessionBackend.php b/typo3/sysext/core/Classes/Session/Backend/RedisSessionBackend.php
index 716cf94ec8058703db0d09573e52e2707007e0f8..336c2ba8b62eac3ed32bd0a67bac2d7c55a07f2e 100644
--- a/typo3/sysext/core/Classes/Session/Backend/RedisSessionBackend.php
+++ b/typo3/sysext/core/Classes/Session/Backend/RedisSessionBackend.php
@@ -149,7 +149,13 @@ class RedisSessionBackend implements SessionBackendInterface, HashableSessionBac
     public function remove(string $sessionId): bool
     {
         $this->initializeConnection();
-        return $this->redis->del($this->getSessionKeyName($this->hash($sessionId))) >= 1;
+
+        $deleteResult = $this->redis->del($this->getSessionKeyName($this->hash($sessionId)));
+
+        // Redis delete result is either `int`, `false` or a `\Redis` multi mode object, where delete state cannot get
+        // determined. Multi mode is not even supported by this session backend at all, therefore we handle this case as
+        // "not successful".
+        return is_int($deleteResult) && $deleteResult >= 1;
     }
 
     /**