diff --git a/docs/tutorials/vmm-configuration.md b/docs/tutorials/vmm-configuration.md
index 07e06426a..8d6e3b320 100644
--- a/docs/tutorials/vmm-configuration.md
+++ b/docs/tutorials/vmm-configuration.md
@@ -97,6 +97,7 @@ address = "127.0.0.1:9080"
 reuse = true
 kms_url = "http://127.0.0.1:8081"
 event_buffer_size = 20
+max_event_name_len = 128
 node_name = ""
 image_path = "/var/lib/dstack/images"
 
diff --git a/dstack/vmm/src/app.rs b/dstack/vmm/src/app.rs
index df3e99281..e32d95748 100644
--- a/dstack/vmm/src/app.rs
+++ b/dstack/vmm/src/app.rs
@@ -1507,6 +1507,10 @@ impl App {
     }
 
     pub(crate) fn vm_event_report(&self, cid: u32, event: &str, body: String) -> Result<()> {
+        if event.len() > self.config.max_event_name_len {
+            error!(cid, "event name too large, skipping");
+            return Ok(());
+        }
         info!(cid, event, "VM event");
         if body.len() > 1024 * 4 {
             error!("Event body too large, skipping");
diff --git a/dstack/vmm/src/config.rs b/dstack/vmm/src/config.rs
index 0d3d40a3e..61658edf7 100644
--- a/dstack/vmm/src/config.rs
+++ b/dstack/vmm/src/config.rs
@@ -658,6 +658,9 @@ pub struct Config {
     /// The buffer size in VMM process for guest events
     pub event_buffer_size: usize,
 
+    /// Maximum length in bytes of a guest-reported event name
+    pub max_event_name_len: usize,
+
     /// CVM configuration
     pub cvm: CvmConfig,
 
diff --git a/dstack/vmm/vmm.toml b/dstack/vmm/vmm.toml
index 1cf52e0c0..663d424bc 100644
--- a/dstack/vmm/vmm.toml
+++ b/dstack/vmm/vmm.toml
@@ -12,6 +12,7 @@ address = "unix:./vmm.sock"
 reuse = true
 kms_url = "http://127.0.0.1:8081"
 event_buffer_size = 20
+max_event_name_len = 128
 node_name = ""
 
 [image]