diff --git a/src/system/kernel/fs/vfs.cpp b/src/system/kernel/fs/vfs.cpp
index 54731b6b0e..ad8b522bce 100644
--- a/src/system/kernel/fs/vfs.cpp
+++ b/src/system/kernel/fs/vfs.cpp
@@ -4117,6 +4117,8 @@ read_file_io_vec_pages(int fd, const file_io_vec* fileVecs, size_t fileVecCount,
 	FileDescriptorPutter descriptor(get_fd_and_vnode(fd, &vnode, true));
 	if (!descriptor.IsSet())
 		return B_FILE_ERROR;
+	if ((descriptor->open_mode & O_RWMASK) == O_WRONLY)
+		return B_FILE_ERROR;
 
 	status_t status = common_file_io_vec_pages(vnode, descriptor->cookie,
 		fileVecs, fileVecCount, vecs, vecCount, _vecIndex, _vecOffset, _bytes,
@@ -4135,6 +4137,8 @@ write_file_io_vec_pages(int fd, const file_io_vec* fileVecs, size_t fileVecCount
 	FileDescriptorPutter descriptor(get_fd_and_vnode(fd, &vnode, true));
 	if (!descriptor.IsSet())
 		return B_FILE_ERROR;
+	if ((descriptor->open_mode & O_RWMASK) == O_RDONLY)
+		return B_FILE_ERROR;
 
 	status_t status = common_file_io_vec_pages(vnode, descriptor->cookie,
 		fileVecs, fileVecCount, vecs, vecCount, _vecIndex, _vecOffset, _bytes,
diff --git a/src/system/kernel/fs/vfs_request_io.cpp b/src/system/kernel/fs/vfs_request_io.cpp
index 51d5498d73..1b51928b48 100644
--- a/src/system/kernel/fs/vfs_request_io.cpp
+++ b/src/system/kernel/fs/vfs_request_io.cpp
@@ -504,6 +504,13 @@ do_iterative_fd_io(int fd, io_request* request, iterative_io_get_vecs getVecs,
 
 	struct vnode* vnode;
 	file_descriptor* descriptor = get_fd_and_vnode(fd, &vnode, true);
+	FileDescriptorPutter descriptorPutter(descriptor);
+	if (descriptor != NULL && (request->IsWrite()
+			? (descriptor->open_mode & O_RWMASK) == O_RDONLY
+			: (descriptor->open_mode & O_RWMASK) == O_WRONLY)) {
+		descriptor = NULL;
+	}
+
 	if (descriptor == NULL) {
 		if (finished != NULL)
 			finished(cookie, request, B_FILE_ERROR, true, 0);
@@ -511,8 +518,6 @@ do_iterative_fd_io(int fd, io_request* request, iterative_io_get_vecs getVecs,
 		return B_FILE_ERROR;
 	}
 
-	FileDescriptorPutter descriptorPutter(descriptor);
-
 	if (!HAS_FS_CALL(vnode, io)) {
 		// no io() call -- fall back to synchronous I/O
 		return do_synchronous_iterative_vnode_io(vnode, descriptor->cookie,