diff --git a/Changelog.md b/Changelog.md
index 2b292e09e..189a04754 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added `VK_NV_coverage_reduction_mode` device extension (#617)
 - Added `VK_EXT_sample_locations` device extension (#616)
 - Update Vulkan-Headers to 1.3.211 (#605, #608)
 
diff --git a/ash/src/extensions/ext/calibrated_timestamps.rs b/ash/src/extensions/ext/calibrated_timestamps.rs
index c5e8db773..241a9907d 100644
--- a/ash/src/extensions/ext/calibrated_timestamps.rs
+++ b/ash/src/extensions/ext/calibrated_timestamps.rs
@@ -1,4 +1,4 @@
-use crate::prelude::{read_into_uninitialized_vector, VkResult};
+use crate::prelude::*;
 use crate::vk;
 use crate::{Entry, Instance};
 use std::ffi::CStr;
diff --git a/ash/src/extensions/nv/coverage_reduction_mode.rs b/ash/src/extensions/nv/coverage_reduction_mode.rs
new file mode 100644
index 000000000..fa972fa3c
--- /dev/null
+++ b/ash/src/extensions/nv/coverage_reduction_mode.rs
@@ -0,0 +1,66 @@
+use crate::prelude::*;
+use crate::vk;
+use crate::{Entry, Instance};
+use std::ffi::CStr;
+use std::mem;
+
+/// <https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_NV_coverage_reduction_mode.html>
+#[derive(Clone)]
+pub struct CoverageReductionMode {
+    fp: vk::NvCoverageReductionModeFn,
+}
+
+impl CoverageReductionMode {
+    pub fn new(entry: &Entry, instance: &Instance) -> Self {
+        let fp = vk::NvCoverageReductionModeFn::load(|name| unsafe {
+            mem::transmute(entry.get_instance_proc_addr(instance.handle(), name.as_ptr()))
+        });
+        Self { fp }
+    }
+
+    /// Retrieve the number of elements to pass to [`get_physical_device_supported_framebuffer_mixed_samples_combinations()`][Self::get_physical_device_supported_framebuffer_mixed_samples_combinations()]
+    pub unsafe fn get_physical_device_supported_framebuffer_mixed_samples_combinations_len(
+        &self,
+        physical_device: vk::PhysicalDevice,
+    ) -> VkResult<usize> {
+        let mut count = 0;
+        (self
+            .fp
+            .get_physical_device_supported_framebuffer_mixed_samples_combinations_nv)(
+            physical_device,
+            &mut count,
+            std::ptr::null_mut(),
+        )
+        .result_with_success(count as usize)
+    }
+
+    /// <https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkGetPhysicalDeviceSupportedFramebufferMixedSamplesCombinationsNV.html>
+    ///
+    /// Call [`get_physical_device_supported_framebuffer_mixed_samples_combinations_len()`][Self::get_physical_device_supported_framebuffer_mixed_samples_combinations_len()] to query the number of elements to pass to `out`.
+    /// Be sure to [`Default::default()`]-initialize these elements and optionally set their `p_next` pointer.
+    pub unsafe fn get_physical_device_supported_framebuffer_mixed_samples_combinations(
+        &self,
+        physical_device: vk::PhysicalDevice,
+        out: &mut [vk::FramebufferMixedSamplesCombinationNV],
+    ) -> VkResult<()> {
+        let mut count = out.len() as u32;
+        (self
+            .fp
+            .get_physical_device_supported_framebuffer_mixed_samples_combinations_nv)(
+            physical_device,
+            &mut count,
+            out.as_mut_ptr(),
+        )
+        .result()?;
+        assert_eq!(count as usize, out.len());
+        Ok(())
+    }
+
+    pub const fn name() -> &'static CStr {
+        vk::NvCoverageReductionModeFn::name()
+    }
+
+    pub fn fp(&self) -> &vk::NvCoverageReductionModeFn {
+        &self.fp
+    }
+}
diff --git a/ash/src/extensions/nv/mod.rs b/ash/src/extensions/nv/mod.rs
index 47b952fb1..bfde37a55 100644
--- a/ash/src/extensions/nv/mod.rs
+++ b/ash/src/extensions/nv/mod.rs
@@ -1,7 +1,9 @@
+pub use self::coverage_reduction_mode::CoverageReductionMode;
 pub use self::device_diagnostic_checkpoints::DeviceDiagnosticCheckpoints;
 pub use self::mesh_shader::MeshShader;
 pub use self::ray_tracing::RayTracing;
 
+mod coverage_reduction_mode;
 mod device_diagnostic_checkpoints;
 mod mesh_shader;
 mod ray_tracing;