diff --git a/pvmfw/src/bootargs.rs b/pvmfw/src/bootargs.rs
new file mode 100644
index 0000000..f9c8278
--- /dev/null
+++ b/pvmfw/src/bootargs.rs
@@ -0,0 +1,211 @@
+// Copyright 2023, The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Routines for parsing bootargs
+
+#[cfg(not(test))]
+use alloc::format;
+#[cfg(not(test))]
+use alloc::string::String;
+use core::ffi::CStr;
+
+/// A single boot argument ex: "panic", "init=", or "foo=1,2,3".
+pub struct BootArg<'a> {
+    arg: &'a str,
+    equal_sign: Option<usize>,
+}
+
+impl AsRef<str> for BootArg<'_> {
+    fn as_ref(&self) -> &str {
+        self.arg
+    }
+}
+
+impl BootArg<'_> {
+    /// Name of the boot argument
+    pub fn name(&self) -> &str {
+        if let Some(n) = self.equal_sign {
+            &self.arg[..n]
+        } else {
+            self.arg
+        }
+    }
+
+    /// Optional value of the boot aragument. This includes the '=' prefix.
+    pub fn value(&self) -> Option<&str> {
+        Some(&self.arg[self.equal_sign?..])
+    }
+}
+
+/// Iterator that iteratos over bootargs
+pub struct BootArgsIterator<'a> {
+    arg: &'a str,
+}
+
+impl<'a> BootArgsIterator<'a> {
+    /// Creates a new iterator from the raw boot args. The input has to be encoded in ASCII
+    pub fn new(bootargs: &'a CStr) -> Result<Self, String> {
+        let arg = bootargs.to_str().map_err(|e| format!("{e}"))?;
+        if !arg.is_ascii() {
+            return Err(format!("{arg:?} is not ASCII"));
+        }
+
+        Ok(Self { arg })
+    }
+
+    // Finds the end of a value in the given string `s`, and returns the index of the end. A value
+    // can have spaces if quoted. The quote character can't be escaped.
+    fn find_value_end(s: &str) -> usize {
+        let mut in_quote = false;
+        for (i, c) in s.char_indices() {
+            if c == '"' {
+                in_quote = !in_quote;
+            } else if c.is_whitespace() && !in_quote {
+                return i;
+            }
+        }
+        s.len()
+    }
+}
+
+impl<'a> Iterator for BootArgsIterator<'a> {
+    type Item = BootArg<'a>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        // Skip spaces to find the start of a name. If there's nothing left, that's the end of the
+        // iterator.
+        let arg = self.arg.trim_start();
+        self.arg = arg; // advance before returning
+        if arg.is_empty() {
+            return None;
+        }
+        // Name ends with either whitespace or =. If it ends with =, the value comes immediately
+        // after.
+        let name_end = arg.find(|c: char| c.is_whitespace() || c == '=').unwrap_or(arg.len());
+        let (arg, equal_sign) = match arg.chars().nth(name_end) {
+            Some(c) if c == '=' => {
+                let value_end = name_end + Self::find_value_end(&arg[name_end..]);
+                (&arg[..value_end], Some(name_end))
+            }
+            _ => (&arg[..name_end], None),
+        };
+        self.arg = &self.arg[arg.len()..]; // advance before returning
+        Some(BootArg { arg, equal_sign })
+    }
+}
+
+#[cfg(test)]
+#[allow(dead_code)]
+mod helpers;
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+    use crate::cstr;
+
+    fn check(raw: &CStr, expected: Result<&[(&str, Option<&str>)], ()>) {
+        let actual = BootArgsIterator::new(raw);
+        assert_eq!(actual.is_err(), expected.is_err(), "Unexpected result with {raw:?}");
+        if actual.is_err() {
+            return;
+        }
+        let mut actual = actual.unwrap();
+
+        for (name, value) in expected.unwrap() {
+            let actual = actual.next();
+            assert!(actual.is_some(), "Expected ({}, {:?}) from {raw:?}", name, value);
+            let actual = actual.unwrap();
+            assert_eq!(name, &actual.name(), "Unexpected name from {raw:?}");
+            assert_eq!(value, &actual.value(), "Unexpected value from {raw:?}");
+        }
+        let remaining = actual.next();
+        assert!(
+            remaining.is_none(),
+            "Unexpected extra item from {raw:?}. Got ({}, {:?})",
+            remaining.as_ref().unwrap().name(),
+            remaining.as_ref().unwrap().value()
+        );
+    }
+
+    #[test]
+    fn empty() {
+        check(cstr!(""), Ok(&[]));
+        check(cstr!("    "), Ok(&[]));
+        check(cstr!("  \n  "), Ok(&[]));
+    }
+
+    #[test]
+    fn single() {
+        check(cstr!("foo"), Ok(&[("foo", None)]));
+        check(cstr!("   foo"), Ok(&[("foo", None)]));
+        check(cstr!("foo   "), Ok(&[("foo", None)]));
+        check(cstr!("   foo   "), Ok(&[("foo", None)]));
+    }
+
+    #[test]
+    fn single_with_value() {
+        check(cstr!("foo=bar"), Ok(&[("foo", Some("=bar"))]));
+        check(cstr!("   foo=bar"), Ok(&[("foo", Some("=bar"))]));
+        check(cstr!("foo=bar   "), Ok(&[("foo", Some("=bar"))]));
+        check(cstr!("   foo=bar   "), Ok(&[("foo", Some("=bar"))]));
+
+        check(cstr!("foo="), Ok(&[("foo", Some("="))]));
+        check(cstr!("   foo="), Ok(&[("foo", Some("="))]));
+        check(cstr!("foo=   "), Ok(&[("foo", Some("="))]));
+        check(cstr!("   foo=   "), Ok(&[("foo", Some("="))]));
+    }
+
+    #[test]
+    fn single_with_quote() {
+        check(cstr!("foo=hello\" \"world"), Ok(&[("foo", Some("=hello\" \"world"))]));
+    }
+
+    #[test]
+    fn invalid_encoding() {
+        check(CStr::from_bytes_with_nul(&[255, 255, 255, 0]).unwrap(), Err(()));
+    }
+
+    #[test]
+    fn multiple() {
+        check(
+            cstr!(" a=b   c=d   e=  f g  "),
+            Ok(&[("a", Some("=b")), ("c", Some("=d")), ("e", Some("=")), ("f", None), ("g", None)]),
+        );
+        check(
+            cstr!("   a=b  \n c=d      e=  f g"),
+            Ok(&[("a", Some("=b")), ("c", Some("=d")), ("e", Some("=")), ("f", None), ("g", None)]),
+        );
+    }
+
+    #[test]
+    fn incomplete_quote() {
+        check(
+            cstr!("foo=incomplete\" quote bar=y"),
+            Ok(&[("foo", Some("=incomplete\" quote bar=y"))]),
+        );
+    }
+
+    #[test]
+    fn complex() {
+        check(cstr!("  a  a1=  b=c d=e,f,g x=\"value with quote\" y=val\"ue with \"multiple\" quo\"te  "), Ok(&[
+            ("a", None),
+            ("a1", Some("=")),
+            ("b", Some("=c")),
+            ("d", Some("=e,f,g")),
+            ("x", Some("=\"value with quote\"")),
+            ("y", Some("=val\"ue with \"multiple\" quo\"te")),
+        ]));
+    }
+}
diff --git a/pvmfw/src/fdt.rs b/pvmfw/src/fdt.rs
index d15eaba..c68fc6d 100644
--- a/pvmfw/src/fdt.rs
+++ b/pvmfw/src/fdt.rs
@@ -14,12 +14,14 @@
 
 //! High-level FDT functions.
 
+use crate::bootargs::BootArgsIterator;
 use crate::cstr;
 use crate::helpers::flatten;
 use crate::helpers::GUEST_PAGE_SIZE;
 use crate::helpers::SIZE_4KB;
 use crate::memory::BASE_ADDR;
 use crate::memory::MAX_ADDR;
+use crate::Box;
 use crate::RebootReason;
 use alloc::ffi::CString;
 use alloc::vec::Vec;
@@ -97,7 +99,9 @@
 
 fn patch_bootargs(fdt: &mut Fdt, bootargs: &CStr) -> libfdt::Result<()> {
     let mut node = fdt.chosen_mut()?.ok_or(FdtError::NotFound)?;
-    // TODO(b/275306568) filter out dangerous options
+    // This function is called before the verification is done. So, we just copy the bootargs to
+    // the new FDT unmodified. This will be filtered again in the modify_for_next_stage function
+    // if the VM is not debuggable.
     node.setprop(cstr!("bootargs"), bootargs.to_bytes_with_nul())
 }
 
@@ -675,6 +679,7 @@
     new_instance: bool,
     strict_boot: bool,
     debug_policy: Option<&mut [u8]>,
+    debuggable: bool,
 ) -> libfdt::Result<()> {
     fdt.unpack()?;
 
@@ -690,6 +695,12 @@
         info!("No debug policy found.");
     }
 
+    if debuggable {
+        if let Some(bootargs) = read_bootargs_from(fdt)? {
+            filter_out_dangerous_bootargs(fdt, &bootargs)?;
+        }
+    }
+
     fdt.pack()?;
 
     Ok(())
@@ -745,3 +756,48 @@
     }
     Ok(())
 }
+
+fn read_common_debug_policy(fdt: &Fdt, debug_feature_name: &CStr) -> libfdt::Result<bool> {
+    if let Some(node) = fdt.node(cstr!("/avf/guest/common"))? {
+        if let Some(value) = node.getprop_u32(debug_feature_name)? {
+            return Ok(value == 1);
+        }
+    }
+    Ok(false) // if the policy doesn't exist or not 1, don't enable the debug feature
+}
+
+fn filter_out_dangerous_bootargs(fdt: &mut Fdt, bootargs: &CStr) -> libfdt::Result<()> {
+    let has_crashkernel = read_common_debug_policy(fdt, cstr!("ramdump"))?;
+    let has_console = read_common_debug_policy(fdt, cstr!("log"))?;
+
+    let accepted: &[(&str, Box<dyn Fn(Option<&str>) -> bool>)] = &[
+        ("panic", Box::new(|v| if let Some(v) = v { v == "=-1" } else { false })),
+        ("crashkernel", Box::new(|_| has_crashkernel)),
+        ("console", Box::new(|_| has_console)),
+    ];
+
+    // parse and filter out unwanted
+    let mut filtered = Vec::new();
+    for arg in BootArgsIterator::new(bootargs).map_err(|e| {
+        info!("Invalid bootarg: {e}");
+        FdtError::BadValue
+    })? {
+        match accepted.iter().find(|&t| t.0 == arg.name()) {
+            Some((_, pred)) if pred(arg.value()) => filtered.push(arg),
+            _ => debug!("Rejected bootarg {}", arg.as_ref()),
+        }
+    }
+
+    // flatten into a new C-string
+    let mut new_bootargs = Vec::new();
+    for (i, arg) in filtered.iter().enumerate() {
+        if i != 0 {
+            new_bootargs.push(b' '); // separator
+        }
+        new_bootargs.extend_from_slice(arg.as_ref().as_bytes());
+    }
+    new_bootargs.push(b'\0');
+
+    let mut node = fdt.chosen_mut()?.ok_or(FdtError::NotFound)?;
+    node.setprop(cstr!("bootargs"), new_bootargs.as_slice())
+}
diff --git a/pvmfw/src/main.rs b/pvmfw/src/main.rs
index 662d705..a773f1a 100644
--- a/pvmfw/src/main.rs
+++ b/pvmfw/src/main.rs
@@ -19,6 +19,7 @@
 
 extern crate alloc;
 
+mod bootargs;
 mod config;
 mod crypto;
 mod dice;
@@ -52,6 +53,7 @@
 use libfdt::Fdt;
 use log::{debug, error, info, trace};
 use pvmfw_avb::verify_payload;
+use pvmfw_avb::DebugLevel;
 use pvmfw_embedded_key::PUBLIC_KEY;
 
 const NEXT_BCC_SIZE: usize = GUEST_PAGE_SIZE;
@@ -119,10 +121,12 @@
     flush(next_bcc);
 
     let strict_boot = true;
-    modify_for_next_stage(fdt, next_bcc, new_instance, strict_boot, debug_policy).map_err(|e| {
-        error!("Failed to configure device tree: {e}");
-        RebootReason::InternalError
-    })?;
+    let debuggable = verified_boot_data.debug_level != DebugLevel::None;
+    modify_for_next_stage(fdt, next_bcc, new_instance, strict_boot, debug_policy, debuggable)
+        .map_err(|e| {
+            error!("Failed to configure device tree: {e}");
+            RebootReason::InternalError
+        })?;
 
     info!("Starting payload...");
     Ok(())