diff --git i/src/Symfony/Component/Config/ResourceCheckerConfigCache.php w/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
index 3a3e6c52bb..5841e3029f 100644
--- i/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
+++ w/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
@@ -157,10 +157,8 @@ class ResourceCheckerConfigCache implements ConfigCacheInterface
 
         try {
             $meta = unserialize($content);
-        } catch (\Throwable $e) {
-            if ($e !== $signalingException) {
-                throw $e;
-            }
+        } catch (\Throwable) {
+            // nothing to do
         } finally {
             restore_error_handler();
             ini_set('unserialize_callback_func', $prevUnserializeHandler);
diff --git i/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php w/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
index 8747cbecf4..1a5f731669 100644
--- i/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
+++ w/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
@@ -17,6 +17,17 @@ use Symfony\Component\Config\ResourceCheckerConfigCache;
 use Symfony\Component\Config\ResourceCheckerInterface;
 use Symfony\Component\Config\Tests\Resource\ResourceStub;
 
+final class MyResource implements \Symfony\Component\Config\Resource\SelfCheckingResourceInterface
+{
+    public function __construct(
+        private \DateTimeImmutable $dti
+    ) {}
+
+    public function isFresh(int $timestamp): bool { return false; }
+
+    public function __toString(): string { return ''; }
+}
+
 class ResourceCheckerConfigCacheTest extends TestCase
 {
     private $cacheFile = null;
@@ -129,6 +140,18 @@ class ResourceCheckerConfigCacheTest extends TestCase
         $this->assertFalse($cache->isFresh());
     }
 
+    public function testCacheIsNotFreshWhenUnserializeFails2()
+    {
+        $checker = $this->createMock(ResourceCheckerInterface::class);
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, [$checker]);
+        $cache->write('foo', [new MyResource(new \DateTimeImmutable('now'))]);
+
+        $metaFile = "{$this->cacheFile}.meta";
+        file_put_contents($metaFile, str_replace('-', 'x', file_get_contents($metaFile)));
+
+        $this->assertFalse($cache->isFresh());
+    }
+
     public function testCacheKeepsContent()
     {
         $cache = new ResourceCheckerConfigCache($this->cacheFile);